From 367bb8d3b75cf29549b4fcdcdb87fa1f1d891174 Mon Sep 17 00:00:00 2001
From: Layomi Akinrinade <laakinri@microsoft.com>
Date: Tue, 7 Jul 2020 18:44:47 -0700
Subject: [PATCH 1/2] Add baseline linker warning suppressions for library
 builds

---
 eng/illink.targets                            |   7 +
 .../ILLinker/ILLink.Suppressions.cs           | 276 ++++++++++++++++++
 .../System.Private.CoreLib.csproj             |   1 +
 src/coreclr/src/vm/dispatchinfo.cpp           |   4 +-
 src/coreclr/src/vm/mscorlib.h                 |   5 +-
 .../src/ILLinker/ILLink.Suppressions.cs       |  27 ++
 .../src/Microsoft.CSharp.csproj               |   1 +
 .../src/ILLinker/ILLink.Suppressions.vb       |  20 ++
 .../src/Microsoft.VisualBasic.Core.vbproj     |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |  14 +
 .../src/MatchingRefApiCompatBaseline.txt      |   2 +
 .../System.ComponentModel.Annotations.csproj  |   2 +
 .../src/ILLinker/ILLink.Suppressions.cs       |  47 +++
 ...System.ComponentModel.TypeConverter.csproj |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |  22 ++
 .../src/System.Data.Common.csproj             |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |   7 +
 ...System.Diagnostics.DiagnosticSource.csproj |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |   7 +
 .../src/System.Diagnostics.TraceSource.csproj |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |   6 +
 .../src/System.Drawing.Primitives.csproj      |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |  55 ++++
 .../src/System.Linq.Expressions.csproj        |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       | 115 ++++++++
 .../src/System.Linq.Queryable.csproj          |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |   8 +
 .../src/System.Net.Http.Json.csproj           |   1 +
 .../src/ILLink/ILLink.Suppressions.cs         |   6 +
 .../src/System.Net.Http.csproj                |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |   6 +
 .../src/System.ObjectModel.csproj             |   1 +
 .../ComponentModel/DefaultValueAttribute.cs   |  54 ++--
 .../src/ILLinker/ILLink.Suppressions.cs       |  59 ++++
 .../src/System.Private.Xml.csproj             |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |  12 +
 .../System.Reflection.DispatchProxy.csproj    |   8 +
 .../src/ILLinker/ILLink.Suppressions.cs       |  37 +++
 .../System.Reflection.TypeExtensions.csproj   |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |   6 +
 .../src/System.Runtime.InteropServices.csproj |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |  16 +
 ...em.Runtime.Serialization.Formatters.csproj |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |   7 +
 ...em.Security.Cryptography.Algorithms.csproj |   3 +
 .../src/ILLinker/ILLink.Suppressions.cs       |   6 +
 ...em.Security.Cryptography.Primitives.csproj |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |  16 +
 .../src/System.Text.Json.csproj               |   1 +
 .../src/ILLinker/ILLink.Suppressions.cs       |   9 +
 .../src/System.Text.RegularExpressions.csproj |   1 +
 .../System.Private.CoreLib.csproj             |   2 +
 .../src/ILLink/ILLink.Descriptors.xml         |  30 +-
 .../src/ILLink/ILLink.Suppressions.cs         | 200 +++++++++++++
 54 files changed, 1062 insertions(+), 59 deletions(-)
 create mode 100644 src/coreclr/src/System.Private.CoreLib/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/Microsoft.CSharp/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/Microsoft.VisualBasic.Core/src/ILLinker/ILLink.Suppressions.vb
 create mode 100644 src/libraries/System.ComponentModel.Annotations/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.ComponentModel.Annotations/src/MatchingRefApiCompatBaseline.txt
 create mode 100644 src/libraries/System.ComponentModel.TypeConverter/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Data.Common/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Diagnostics.DiagnosticSource/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Diagnostics.TraceSource/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Drawing.Primitives/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Linq.Expressions/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Linq.Queryable/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Net.Http.Json/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Net.Http/src/ILLink/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.ObjectModel/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Private.Xml/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Reflection.DispatchProxy/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Reflection.TypeExtensions/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Runtime.InteropServices/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Runtime.Serialization.Formatters/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Security.Cryptography.Algorithms/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Security.Cryptography.Primitives/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Text.Json/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/libraries/System.Text.RegularExpressions/src/ILLinker/ILLink.Suppressions.cs
 create mode 100644 src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Suppressions.cs

diff --git a/eng/illink.targets b/eng/illink.targets
index 601b0b798fbca7..2407272a133557 100644
--- a/eng/illink.targets
+++ b/eng/illink.targets
@@ -216,6 +216,13 @@
       <ILLinkArgs>$(ILLinkArgs) --disable-opt unusedinterfaces</ILLinkArgs>
       <!-- keep DynamicDependencyAttribute unless a project explicitly disables it -->
       <ILLinkArgs Condition="'$(ILLinkKeepDepAttributes)' != 'false'">$(ILLinkArgs) --keep-dep-attributes true</ILLinkArgs>
+      <!-- enable verbose output -->
+      <ILLinkArgs>$(ILLinkArgs) --verbose</ILLinkArgs>
+      <!-- suppress "error IL2025: Duplicate preserve of" warnings from verbose output,
+           as we need both linker annotations and xml files
+           suppress "error IL2047: All overridden members must have the same DynamicallyAccessedMembersAttribute usage",
+           as we don't add suppression files for ref projects -->
+      <ILLinkArgs>$(ILLinkArgs) --nowarn IL2025;IL2047</ILLinkArgs>
     </PropertyGroup>
 
     <MakeDir Directories="$(ILLinkTrimInputPath)" />
diff --git a/src/coreclr/src/System.Private.CoreLib/ILLinker/ILLink.Suppressions.cs b/src/coreclr/src/System.Private.CoreLib/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..3729bafd493481
--- /dev/null
+++ b/src/coreclr/src/System.Private.CoreLib/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,276 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "F:System.LazyDebugView`1._lazy")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Internal.Runtime.InteropServices.ComActivator.BasicClassFactory.CreateInstance(System.Object,System.Guid@,System.Object@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Internal.Runtime.InteropServices.ComActivator.ClassRegistrationScenarioForType(Internal.Runtime.InteropServices.ComActivationContext,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Internal.Runtime.InteropServices.ComponentActivator.InternalGetFunctionPointer(System.Runtime.Loader.AssemblyLoadContext,System.String,System.String,System.IntPtr)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Internal.Runtime.InteropServices.LicenseInteropProxy.#ctor")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.AppDomain.GetThreadPrincipal")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Attribute.GetParentDefinition(System.Reflection.EventInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Attribute.GetParentDefinition(System.Reflection.PropertyInfo,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DefaultValueAttribute.TryConvertFromInvariantString(System.Type,System.String,System.Object@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DefaultValueAttribute.{#ctor}g__TryConvertFromInvariantString|2_0(System.Type,System.String,System.Object@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.StackFrameHelper.InitializeSourceInfo(System.Int32,System.Boolean,System.Exception)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.StackTrace.TryResolveStateMachineMethod(System.Reflection.MethodBase@,System.Type@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.EventSource.CreateManifestAndDescriptors(System.Type,System.String,System.Diagnostics.Tracing.EventSource,System.Diagnostics.Tracing.EventManifestOptions)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.EventSource.EnsureDescriptorsInitialized")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.ManifestBuilder.CreateManifestString")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.ManifestBuilder.GetTypeName(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.NullableTypeInfo.#ctor(System.Type,System.Collections.Generic.List{System.Type})")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.NullableTypeInfo.WriteData(System.Diagnostics.Tracing.TraceLoggingDataCollector,System.Diagnostics.Tracing.PropertyValue)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.Statics.GetProperties(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.#ctor(System.Lazy{`0})")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.get_IsValueCreated")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.get_IsValueFaulted")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.get_Mode")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.get_Value")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.CustomAttribute.AddCustomAttributes(System.RuntimeType.ListBuilder{System.Object}@,System.Reflection.RuntimeModule,System.Int32,System.RuntimeType,System.Boolean,System.RuntimeType.ListBuilder{System.Object})")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.CustomAttributeData.#ctor(System.Reflection.RuntimeModule,System.Reflection.MetadataToken,System.Reflection.ConstArray@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.CustomAttributeData.Init(System.Object)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.ConstructorBuilder.#ctor(System.String,System.Reflection.MethodAttributes,System.Reflection.CallingConventions,System.Type[],System.Reflection.Emit.ModuleBuilder,System.Reflection.Emit.TypeBuilder)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.EnumBuilder.#ctor(System.String,System.Type,System.Reflection.TypeAttributes,System.Reflection.Emit.ModuleBuilder)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.ILGenerator.EmitWriteLine(System.Reflection.Emit.LocalBuilder)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.ILGenerator.EmitWriteLine(System.Reflection.FieldInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.ILGenerator.EmitWriteLine(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.TypeBuilder.DefineConstructorNoLock(System.Reflection.MethodAttributes,System.Reflection.CallingConventions,System.Type[],System.Type[][],System.Type[][])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.TypeBuilder.DefineDefaultConstructorNoLock(System.Reflection.MethodAttributes)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.TypeBuilder.DefineMethodNoLock(System.String,System.Reflection.MethodAttributes,System.Reflection.CallingConventions,System.Type,System.Type[],System.Type[],System.Type[],System.Type[][],System.Type[][])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.TypeBuilder.DefinePInvokeMethodHelper(System.String,System.String,System.String,System.Reflection.MethodAttributes,System.Reflection.CallingConventions,System.Type,System.Type[],System.Type[],System.Type[],System.Type[][],System.Type[][],System.Runtime.InteropServices.CallingConvention,System.Runtime.InteropServices.CharSet)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.TypeBuilder.GetConstructor(System.Type,System.Reflection.ConstructorInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.TypeBuilder.GetField(System.Type,System.Reflection.FieldInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.TypeBuilder.GetMethod(System.Type,System.Reflection.MethodInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.TypeBuilderInstantiation.Substitute(System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.RuntimeAssembly.AddPublicNestedTypes(System.Type,System.Collections.Generic.List{System.Type},System.Collections.Generic.List{System.Exception})")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.RuntimeModule.GetField(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.RuntimeModule.GetFields(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.RuntimeModule.GetMethodInternal(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Reflection.CallingConventions,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.RuntimeModule.GetMethods(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.RuntimeModule.ResolveLiteralField(System.Int32,System.Type[],System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.SignatureTypeExtensions.TryMakeGenericType(System.Type,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeInfo.<GetDeclaredMethods>d__10.MoveNext")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeInfo.<get_DeclaredNestedTypes>d__22.MoveNext")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Resources.ManifestBasedResourceGroveler.CreateResourceSet(System.IO.Stream,System.Reflection.Assembly)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Resources.ResourceManager.CreateFileBasedResourceManager(System.String,System.String,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.RuntimeType.ForwardCallToInvokeMember(System.String,System.Reflection.BindingFlags,System.Object,System.Object[],System.Boolean[],System.Int32[],System.Type[],System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.RuntimeType.GetMethodBase(System.RuntimeType,System.RuntimeMethodHandleInternal)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.RuntimeTypeHandle.GetTypeHelper(System.Type,System.Type[],System.IntPtr,System.Int32)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.StartupHookProvider.CallStartupHook(System.StartupHookProvider.StartupHookNameOrPath)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.TypeNameParser.ResolveType(System.Reflection.Assembly,System.String[],System.Func{System.Reflection.Assembly,System.String,System.Boolean,System.Type},System.Boolean,System.Boolean,System.Threading.StackCrawlMark@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.__ComObject.CreateEventProvider(System.RuntimeType)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "T:System.Resources.ResourceReader")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2009", Scope = "member", Target = "T:System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:Internal.Runtime.InteropServices.ComActivator.FindClassType(System.Guid,System.String,System.String,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:Internal.Runtime.InteropServices.ComponentActivator.InternalGetFunctionPointer(System.Runtime.Loader.AssemblyLoadContext,System.String,System.String,System.IntPtr)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:Internal.Runtime.InteropServices.IsolatedComponentLoadContext.Load(System.Reflection.AssemblyName)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Delegate.#ctor(System.Object,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Delegate.#ctor(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Associates.AssignAssociates(System.Int32,System.RuntimeType,System.RuntimeType)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.CustomAttribute.FilterCustomAttributeRecord(System.Reflection.MetadataToken,System.Reflection.MetadataImport@,System.Reflection.RuntimeModule,System.Reflection.MetadataToken,System.RuntimeType,System.Boolean,System.RuntimeType.ListBuilder{System.Object}@,System.RuntimeType@,System.IRuntimeMethodInfo@,System.Boolean@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.CustomAttribute.GetAttributeUsage(System.RuntimeType)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.AssemblyBuilder.GetExportedTypes")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.AssemblyBuilder.GetReferencedAssemblies")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.AssemblyBuilder.GetType(System.String,System.Boolean,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.GetField(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.GetFields(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.GetMemberRefToken(System.Reflection.MethodBase,System.Collections.Generic.IEnumerable{System.Type})")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.GetMethods(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.GetType(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.GetType(System.String,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.GetTypeNoLock(System.String,System.Boolean,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.GetTypeToken(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.ResolveField(System.Int32,System.Type[],System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.ResolveMember(System.Int32,System.Type[],System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.ResolveMethod(System.Int32,System.Type[],System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.ResolveSignature(System.Int32)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.ResolveString(System.Int32)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.Emit.ModuleBuilder.ResolveType(System.Int32,System.Type[],System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.RuntimeExceptionHandlingClause.get_CatchType")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.RuntimeModule.ResolveField(System.Int32,System.Type[],System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.RuntimeModule.ResolveLiteralField(System.Int32,System.Type[],System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.RuntimeModule.ResolveMember(System.Int32,System.Type[],System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.RuntimeModule.ResolveMethod(System.Int32,System.Type[],System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Resources.ResourceSet.GetDefaultWriter")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.StartupHookProvider.CallStartupHook(System.StartupHookProvider.StartupHookNameOrPath)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.TypeNameParser.ResolveType(System.Reflection.Assembly,System.String[],System.Func{System.Reflection.Assembly,System.String,System.Boolean,System.Type},System.Boolean,System.Boolean,System.Threading.StackCrawlMark@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2035", Scope = "member", Target = "M:System.AppDomain.GetThreadPrincipal")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2035", Scope = "member", Target = "M:System.ComponentModel.DefaultValueAttribute.#ctor(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2035", Scope = "member", Target = "M:System.Diagnostics.StackFrameHelper.InitializeSourceInfo(System.Int32,System.Boolean,System.Exception)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2046", Scope = "member", Target = "M:System.Reflection.Emit.AssemblyBuilder.GetExportedTypes")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2046", Scope = "member", Target = "M:System.Reflection.Emit.AssemblyBuilder.GetReferencedAssemblies")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2046", Scope = "member", Target = "M:System.Reflection.Emit.AssemblyBuilder.GetType(System.String,System.Boolean,System.Boolean)")]
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+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetConstructors(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetEvent(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetEvents")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetEvents(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetField(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetFields(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetMember(System.String,System.Reflection.MemberTypes,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetMembers(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetMethodImpl(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Reflection.CallingConventions,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetMethods(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetNestedType(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetNestedTypes(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetProperties(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetPropertyImpl(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Type,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.InvokeMember(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Object,System.Object[],System.Reflection.ParameterModifier[],System.Globalization.CultureInfo,System.String[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetConstructorImpl(System.Reflection.BindingFlags,System.Reflection.Binder,System.Reflection.CallingConventions,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetConstructors(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetEvent(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetEvents(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetField(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetFields(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetMember(System.String,System.Reflection.MemberTypes,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetMembers(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetMethodImpl(System.String,System.Int32,System.Reflection.BindingFlags,System.Reflection.Binder,System.Reflection.CallingConventions,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetMethodImpl(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Reflection.CallingConventions,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetMethods(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetNestedType(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetNestedTypes(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetProperties(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetPropertyImpl(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Type,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetField(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetFields(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetMember(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetMembers(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetMethod(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetMethod(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetMethods(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetProperties(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetProperty(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetProperty(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Type,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.InvokeMember(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Object,System.Object[],System.Reflection.ParameterModifier[],System.Globalization.CultureInfo,System.String[])")]
diff --git a/src/coreclr/src/System.Private.CoreLib/System.Private.CoreLib.csproj b/src/coreclr/src/System.Private.CoreLib/System.Private.CoreLib.csproj
index 501487c6a111bb..a38a2bfcddf9d9 100644
--- a/src/coreclr/src/System.Private.CoreLib/System.Private.CoreLib.csproj
+++ b/src/coreclr/src/System.Private.CoreLib/System.Private.CoreLib.csproj
@@ -269,6 +269,7 @@
     <Compile Include="$(CommonPath)Interop\Windows\OleAut32\Interop.SysAllocStringByteLen.cs">
       <Link>Common\Interop\Windows\OleAut32\Interop.SysAllocStringByteLen.cs</Link>
     </Compile>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
   </ItemGroup>
   <!-- These classes are only used for FeatureCominterop, but they are referenced by tests
        in order to allow tests to be built on all platforms, these classes are included for all
diff --git a/src/coreclr/src/vm/dispatchinfo.cpp b/src/coreclr/src/vm/dispatchinfo.cpp
index 76ee48ff6a9238..883b32c77fd7f1 100644
--- a/src/coreclr/src/vm/dispatchinfo.cpp
+++ b/src/coreclr/src/vm/dispatchinfo.cpp
@@ -1602,7 +1602,7 @@ void DispatchInfo::InvokeMemberWorker(DispatchMemberInfo*   pDispMemberInfo,
                         COMPlusThrowHR(DISP_E_BADPARAMCOUNT);
 
                     // Retrieve the method descriptor that will be called on.
-                    MethodDesc *pMD = GetFieldInfoMD(METHOD__FIELD__GET_VALUE, pObjs->MemberInfo->GetTypeHandle());
+                    MethodDesc *pMD = GetFieldInfoMD(METHOD__FIELD_INFO__GET_VALUE, pObjs->MemberInfo->GetTypeHandle());
                     MethodDescCallSite getValue(pMD, &pObjs->MemberInfo);
 
                     // Prepare the arguments that will be passed to Invoke.
@@ -1624,7 +1624,7 @@ void DispatchInfo::InvokeMemberWorker(DispatchMemberInfo*   pDispMemberInfo,
                         COMPlusThrowHR(DISP_E_NONAMEDARGS);
 
                     // Retrieve the method descriptor that will be called on.
-                    MethodDesc *pMD = GetFieldInfoMD(METHOD__FIELD__SET_VALUE, pObjs->MemberInfo->GetTypeHandle());
+                    MethodDesc *pMD = GetFieldInfoMD(METHOD__FIELD_INFO__SET_VALUE, pObjs->MemberInfo->GetTypeHandle());
                     MethodDescCallSite setValue(pMD, &pObjs->MemberInfo);
 
                     // Prepare the arguments that will be passed to Invoke.
diff --git a/src/coreclr/src/vm/mscorlib.h b/src/coreclr/src/vm/mscorlib.h
index fd2578fcaea82f..6bfc209b595623 100644
--- a/src/coreclr/src/vm/mscorlib.h
+++ b/src/coreclr/src/vm/mscorlib.h
@@ -390,8 +390,6 @@ DEFINE_METHOD(STUBFIELDINFO,        CTOR,                   .ctor,
 #endif
 
 DEFINE_CLASS(FIELD,                 Reflection,             RuntimeFieldInfo)
-DEFINE_METHOD(FIELD,                SET_VALUE,              SetValue,                   IM_Obj_Obj_BindingFlags_Binder_CultureInfo_RetVoid)
-DEFINE_METHOD(FIELD,                GET_VALUE,              GetValue,                   IM_Obj_RetObj)
 
 DEFINE_CLASS(FIELD_HANDLE,          System,                 RuntimeFieldHandle)
 DEFINE_FIELD(FIELD_HANDLE,          M_FIELD,                m_ptr)
@@ -399,7 +397,8 @@ DEFINE_FIELD(FIELD_HANDLE,          M_FIELD,                m_ptr)
 DEFINE_CLASS(I_RT_FIELD_INFO,       System,                 IRuntimeFieldInfo)
 
 DEFINE_CLASS(FIELD_INFO,            Reflection,             FieldInfo)
-
+DEFINE_METHOD(FIELD_INFO,                SET_VALUE,              SetValue,                   IM_Obj_Obj_BindingFlags_Binder_CultureInfo_RetVoid)
+DEFINE_METHOD(FIELD_INFO,                GET_VALUE,              GetValue,                   IM_Obj_RetObj)
 
 DEFINE_CLASS(GUID,                  System,                 Guid)
 
diff --git a/src/libraries/Microsoft.CSharp/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/Microsoft.CSharp/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..635ccff47edbda
--- /dev/null
+++ b/src/libraries/Microsoft.CSharp/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,27 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.ComInterop.ComBinderHelpers.ProcessArgumentsForCom(System.Dynamic.DynamicMetaObject[]@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.ComInterop.ComTypeClassDesc.CreateInstance")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.ComInterop.ExcepInfo.GetException")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.ComInterop.IDispatchComObject.GetMembers(System.Collections.Generic.IEnumerable{System.String})")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.ComInterop.TypeUtils.GetUserDefinedCoercionMethod(System.Type,System.Type,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.ComInterop.VariantArray.GetStructType(System.Int32)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.DynamicMetaObjectProviderDebugView.CreateDelegateAndInvoke(System.Type[],System.Runtime.CompilerServices.CallSiteBinder,System.Object[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.ExpressionTreeCallRewriter.GenerateField(Microsoft.CSharp.RuntimeBinder.Semantics.ExprCall)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.RuntimeBinderExtensions.GetTypeIndexerName(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.Semantics.AggregateType.CalculateAssociatedSystemType")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.Semantics.ExprFactory.CreateZeroInit(Microsoft.CSharp.RuntimeBinder.Semantics.CType)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.Semantics.ExprMethodInfo.get_ConstructorInfo")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.Semantics.ExprMethodInfo.get_MethodInfo")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.Semantics.ExprPropertyInfo.get_PropertyInfo")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.Semantics.ExprZeroInit.get_Object")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.SymbolTable.AddAggregateToSymbolTable(Microsoft.CSharp.RuntimeBinder.Semantics.NamespaceOrAggregateSymbol,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.SymbolTable.AddConversionsForOneType(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.SymbolTable.AddNamesInInheritanceHierarchy(System.String,System.Collections.Generic.List{System.Type})")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.SymbolTable.AddPredefinedMethodToSymbolTable(Microsoft.CSharp.RuntimeBinder.Semantics.AggregateSymbol,Microsoft.CSharp.RuntimeBinder.Syntax.Name)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.SymbolTable.AddPredefinedPropertyToSymbolTable(Microsoft.CSharp.RuntimeBinder.Semantics.AggregateSymbol,Microsoft.CSharp.RuntimeBinder.Syntax.Name)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.SymbolTable.BuildDeclarationChain(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:Microsoft.CSharp.RuntimeBinder.DynamicMetaObjectProviderDebugView.#cctor")]
diff --git a/src/libraries/Microsoft.CSharp/src/Microsoft.CSharp.csproj b/src/libraries/Microsoft.CSharp/src/Microsoft.CSharp.csproj
index 0a85130f66d8b0..5c21b006748858 100644
--- a/src/libraries/Microsoft.CSharp/src/Microsoft.CSharp.csproj
+++ b/src/libraries/Microsoft.CSharp/src/Microsoft.CSharp.csproj
@@ -12,6 +12,7 @@
     <AllowUnsafeBlocks Condition="'$(EnableComBinder)'=='true'">true</AllowUnsafeBlocks>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="Microsoft\CSharp\RuntimeBinder\ArgumentObject.cs" />
     <Compile Include="Microsoft\CSharp\RuntimeBinder\Binder.cs" />
     <Compile Include="Microsoft\CSharp\RuntimeBinder\BinderEquivalence.cs" />
diff --git a/src/libraries/Microsoft.VisualBasic.Core/src/ILLinker/ILLink.Suppressions.vb b/src/libraries/Microsoft.VisualBasic.Core/src/ILLinker/ILLink.Suppressions.vb
new file mode 100644
index 00000000000000..82e2c38b37506b
--- /dev/null
+++ b/src/libraries/Microsoft.VisualBasic.Core/src/ILLinker/ILLink.Suppressions.vb
@@ -0,0 +1,20 @@
+' Licensed to the .NET Foundation under one or more agreements.
+' The .NET Foundation licenses this file to you under the MIT license.
+
+Imports System.Diagnostics.CodeAnalysis
+
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.Conversions.ChangeType(System.Object,System.Type,System.Boolean)")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.IDOUtils.CreateConvertCallSiteAndInvoke(System.Dynamic.ConvertBinder,System.Object)")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.IDOUtils.CreateFuncCallSiteAndInvoke(System.Runtime.CompilerServices.CallSiteBinder,System.Object,System.Object[])")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.IDOUtils.CreateRefCallSiteAndInvoke(System.Runtime.CompilerServices.CallSiteBinder,System.Object,System.Object[])")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.LateBinding.GetDefaultMembers(System.Type,System.Reflection.IReflect,System.String@)")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.StructUtils.EnumerateUDT(System.ValueType,Microsoft.VisualBasic.CompilerServices.IRecordEnum,System.Boolean)")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.Symbols.Container.LookupDefaultMembers(System.String@,System.Type)")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.Symbols.Container.LookupNamedMembers(System.String)")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.Symbols.Container.LookupWinRTCollectionInterfaceMembers(System.String)")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.Symbols.Method.BindGenericArguments")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.CompilerServices.Symbols.Method.get_RawParametersFromType")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.FileIO.SpecialDirectories.GetWindowsFormsDirectory(System.String,System.String)")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.Interaction.CreateObject(System.String,System.String)")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.Interaction.GetObject(System.String,System.String)")>
+<Assembly: UnconditionalSuppressMessage("ILLinker", "IL2006", Scope:="member", Target:="M:Microsoft.VisualBasic.Interaction.InvokeMethod(System.String,System.Object[])")>
diff --git a/src/libraries/Microsoft.VisualBasic.Core/src/Microsoft.VisualBasic.Core.vbproj b/src/libraries/Microsoft.VisualBasic.Core/src/Microsoft.VisualBasic.Core.vbproj
index 3fe68cb9c08710..3aae40b36487f3 100644
--- a/src/libraries/Microsoft.VisualBasic.Core/src/Microsoft.VisualBasic.Core.vbproj
+++ b/src/libraries/Microsoft.VisualBasic.Core/src/Microsoft.VisualBasic.Core.vbproj
@@ -27,6 +27,7 @@
     <Compile Include="Microsoft\VisualBasic\Helpers\UnsafeNativeMethods.vb" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.vb" />
     <Compile Include="Microsoft\VisualBasic\Collection.vb" />
     <Compile Include="Microsoft\VisualBasic\ComClassAttribute.vb" />
     <Compile Include="Microsoft\VisualBasic\CompilerServices\BooleanType.vb" />
diff --git a/src/libraries/System.ComponentModel.Annotations/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.ComponentModel.Annotations/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..4e59f70e6bd083
--- /dev/null
+++ b/src/libraries/System.ComponentModel.Annotations/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,14 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DataAnnotations.AssociatedMetadataTypeTypeDescriptor.TypeDescriptorCache.CheckAssociatedMetadataType(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DataAnnotations.AssociatedMetadataTypeTypeDescriptor.TypeDescriptorCache.GetAssociatedMetadata(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DataAnnotations.CompareAttribute.IsValid(System.Object,System.ComponentModel.DataAnnotations.ValidationContext)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DataAnnotations.LocalizableString.GetLocalizableValue")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DataAnnotations.CountPropertyHelper.TryGetCount(System.Object,System.Int32@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DataAnnotations.CustomValidationAttribute.ValidateMethodParameter")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DataAnnotations.ValidationAttribute.SetResourceAccessorByPropertyLookup")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DataAnnotations.ValidationAttributeStore.TypeStoreItem.CreatePropertyStoreItems")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DataAnnotations.Validator.GetPropertyValues(System.Object,System.ComponentModel.DataAnnotations.ValidationContext)")]
diff --git a/src/libraries/System.ComponentModel.Annotations/src/MatchingRefApiCompatBaseline.txt b/src/libraries/System.ComponentModel.Annotations/src/MatchingRefApiCompatBaseline.txt
new file mode 100644
index 00000000000000..75eb292e8d8972
--- /dev/null
+++ b/src/libraries/System.ComponentModel.Annotations/src/MatchingRefApiCompatBaseline.txt
@@ -0,0 +1,2 @@
+# Exposed publicly in the implementation to suppress linker warnings.
+TypesMustExist : Type 'System.Diagnostics.CodeAnalysis.UnconditionalSuppressMessageAttribute' does not exist in the reference but it does exist in the implementation.
\ No newline at end of file
diff --git a/src/libraries/System.ComponentModel.Annotations/src/System.ComponentModel.Annotations.csproj b/src/libraries/System.ComponentModel.Annotations/src/System.ComponentModel.Annotations.csproj
index e871a28c7c0e62..871b7a2516f0fd 100644
--- a/src/libraries/System.ComponentModel.Annotations/src/System.ComponentModel.Annotations.csproj
+++ b/src/libraries/System.ComponentModel.Annotations/src/System.ComponentModel.Annotations.csproj
@@ -3,6 +3,7 @@
     <TargetFrameworks>netstandard2.1</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\ComponentModel\DataAnnotations\AssociatedMetadataTypeTypeDescriptor.cs" />
     <Compile Include="System\ComponentModel\DataAnnotations\AssociatedMetadataTypeTypeDescriptionProvider.cs" />
     <Compile Include="System\ComponentModel\DataAnnotations\AssociationAttribute.cs" />
@@ -52,5 +53,6 @@
     <Compile Include="System\ComponentModel\DataAnnotations\Validator.cs" />
     <Compile Include="$(CommonPath)System\NotImplemented.cs"
              Link="Common\System\NotImplemented.cs" />
+    <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\UnconditionalSuppressMessageAttribute.cs" />
   </ItemGroup>
 </Project>
diff --git a/src/libraries/System.ComponentModel.TypeConverter/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.ComponentModel.TypeConverter/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..038c98d5df7858
--- /dev/null
+++ b/src/libraries/System.ComponentModel.TypeConverter/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,47 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.AttributeCollection.GetDefaultAttribute(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.BindingList`1.AddNewCore")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.BindingList`1.get_ItemTypeHasDefaultConstructor")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ComponentResourceManager.ApplyResources(System.Object,System.String,System.Globalization.CultureInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.EnumConverter.ConvertTo(System.ComponentModel.ITypeDescriptorContext,System.Globalization.CultureInfo,System.Object,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.EnumConverter.GetStandardValues(System.ComponentModel.ITypeDescriptorContext)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.InstallerTypeAttribute.get_InstallerType")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.LicenseManager.CreateWithContext(System.Type,System.ComponentModel.LicenseContext,System.Object[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.LicenseManager.ValidateInternalRecursive(System.ComponentModel.LicenseContext,System.Type,System.Object,System.Boolean,System.ComponentModel.License@,System.String@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.LicenseProviderAttribute.get_LicenseProvider")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.MaskedTextProvider.Clone")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.MemberDescriptor.FindMethod(System.Type,System.String,System.Type[],System.Type,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.NullableConverter.ConvertTo(System.ComponentModel.ITypeDescriptorContext,System.Globalization.CultureInfo,System.Object,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.PropertyDescriptor.CreateInstance(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.PropertyDescriptor.GetTypeFromName(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.ComponentModel.PropertyDescriptor.GetTypeFromName(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.PropertyTabAttribute.get_TabClasses")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.ComponentModel.PropertyTabAttribute.get_TabClasses")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectEventDescriptor.FillEventInfoAttribute(System.Reflection.EventInfo,System.Collections.IList)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectEventDescriptor.FillMethods")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectEventDescriptor.FillSingleMethodAttribute(System.Reflection.MethodInfo,System.Collections.IList)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectPropertyDescriptor.FillAttributes(System.Collections.IList)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectPropertyDescriptor.get_GetMethodValue")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectPropertyDescriptor.get_SetMethodValue")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.CreateInstance(System.IServiceProvider,System.Type,System.Type[],System.Object[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.CreateInstance(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.GetEditorTable(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.GetTypeFromName(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.ReflectGetEvents(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.ReflectGetExtendedProperties(System.ComponentModel.IExtenderProvider)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.ReflectGetProperties(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.ReflectedTypeData.GetEditorAttribute(System.ComponentModel.AttributeCollection,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.ReflectedTypeData.GetTypeFromName(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.ReflectedTypeData.GetTypeFromName(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ReflectTypeDescriptionProvider.SearchIntrinsicTable(System.Collections.Hashtable,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.ToolboxItemAttribute.get_ToolboxItemType")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.TypeDescriptionProvider.CreateInstance(System.IServiceProvider,System.Type,System.Type[],System.Object[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.TypeDescriptor.CheckDefaultProvider(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.TypeDescriptor.ComNativeDescriptorProxy.#ctor")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.ComponentModel.TypeDescriptor.ComNativeDescriptorProxy.#ctor")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.TypeDescriptor.CreateDesigner(System.ComponentModel.IComponent,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "T:System.Drawing.ColorTable")]
diff --git a/src/libraries/System.ComponentModel.TypeConverter/src/System.ComponentModel.TypeConverter.csproj b/src/libraries/System.ComponentModel.TypeConverter/src/System.ComponentModel.TypeConverter.csproj
index f4869cbbb261c8..39b8252fcf0704 100644
--- a/src/libraries/System.ComponentModel.TypeConverter/src/System.ComponentModel.TypeConverter.csproj
+++ b/src/libraries/System.ComponentModel.TypeConverter/src/System.ComponentModel.TypeConverter.csproj
@@ -7,6 +7,7 @@
     <TargetFrameworks>$(NetCoreAppCurrent)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="MS\Internal\Xml\Linq\ComponentModel\XComponentModel.cs" />
     <Compile Include="System\ComponentModel\ArrayConverter.cs" />
     <Compile Include="System\ComponentModel\BaseNumberConverter.cs" />
diff --git a/src/libraries/System.Data.Common/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Data.Common/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..b0d3915feb5a60
--- /dev/null
+++ b/src/libraries/System.Data.Common/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,22 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.Common.DataAdapter.CloneInternals")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.Common.DataStorage.GetType(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.Common.DbProviderFactories.GetFactoryInstance(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.Common.DbProviderFactories.GetProviderTypeFromTypeName(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.Common.ObjectStorage.ConvertXmlToObject(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.Common.ObjectStorage.ConvertXmlToObject(System.Xml.XmlReader,System.Xml.Serialization.XmlRootAttribute)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.Common.SqlUdtStorage.ConvertXmlToObject(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.Common.SqlUdtStorage.ConvertXmlToObject(System.Xml.XmlReader,System.Xml.Serialization.XmlRootAttribute)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.DataColumn.Clone")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.DataColumn.get_DefaultValue")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.DataRowExtensions.UnboxT`1.Create")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.DataSet.Clone")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.DataTable.CreateInstance")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.DataTable.DeserializeTableSchema(System.Runtime.Serialization.SerializationInfo,System.Runtime.Serialization.StreamingContext,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.FunctionNode.GetDataType(System.Data.ExpressionNode)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Data.XSDSchema.SetProperties(System.Object,System.Xml.XmlAttribute[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "T:System.Data.Common.SqlUdtStorage")]
diff --git a/src/libraries/System.Data.Common/src/System.Data.Common.csproj b/src/libraries/System.Data.Common/src/System.Data.Common.csproj
index a872f6cefe4519..648bdf12a1d666 100644
--- a/src/libraries/System.Data.Common/src/System.Data.Common.csproj
+++ b/src/libraries/System.Data.Common/src/System.Data.Common.csproj
@@ -6,6 +6,7 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System.Data.Common.TypeForwards.cs" />
     <Compile Include="System\Data\DataReaderExtensions.cs" />
     <Compile Include="System\HResults.cs" />
diff --git a/src/libraries/System.Diagnostics.DiagnosticSource/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Diagnostics.DiagnosticSource/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..30f353a18794f8
--- /dev/null
+++ b/src/libraries/System.Diagnostics.DiagnosticSource/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.DiagnosticSourceEventSource.FilterAndTransform.MakeImplicitTransforms(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.DiagnosticSourceEventSource.TransformSpec.PropertySpec.PropertyFetch.FetcherForProperty(System.Type,System.String)")]
diff --git a/src/libraries/System.Diagnostics.DiagnosticSource/src/System.Diagnostics.DiagnosticSource.csproj b/src/libraries/System.Diagnostics.DiagnosticSource/src/System.Diagnostics.DiagnosticSource.csproj
index 0745b28f5a9542..6ffbe85c4566ad 100644
--- a/src/libraries/System.Diagnostics.DiagnosticSource/src/System.Diagnostics.DiagnosticSource.csproj
+++ b/src/libraries/System.Diagnostics.DiagnosticSource/src/System.Diagnostics.DiagnosticSource.csproj
@@ -22,6 +22,7 @@
     <DefineConstants Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">$(DefineConstants);W3C_DEFAULT_ID_FORMAT</DefineConstants>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Diagnostics\DiagnosticSource.cs" />
     <Compile Include="System\Diagnostics\DiagnosticListener.cs" />
     <Compile Include="System\Diagnostics\DiagnosticSourceEventSource.cs" />
diff --git a/src/libraries/System.Diagnostics.TraceSource/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Diagnostics.TraceSource/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..32a83d8c920708
--- /dev/null
+++ b/src/libraries/System.Diagnostics.TraceSource/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "T:System.Diagnostics.SwitchAttribute")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Diagnostics.SwitchAttribute.GetAll(System.Reflection.Assembly)")]
diff --git a/src/libraries/System.Diagnostics.TraceSource/src/System.Diagnostics.TraceSource.csproj b/src/libraries/System.Diagnostics.TraceSource/src/System.Diagnostics.TraceSource.csproj
index 7baa10ff2bb9e4..e35738f2c8a981 100644
--- a/src/libraries/System.Diagnostics.TraceSource/src/System.Diagnostics.TraceSource.csproj
+++ b/src/libraries/System.Diagnostics.TraceSource/src/System.Diagnostics.TraceSource.csproj
@@ -5,6 +5,7 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Diagnostics\BooleanSwitch.cs" />
     <Compile Include="System\Diagnostics\CorrelationManager.cs" />
     <Compile Include="System\Diagnostics\DefaultTraceListener.cs" />
diff --git a/src/libraries/System.Drawing.Primitives/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Drawing.Primitives/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..a5defb3db63c23
--- /dev/null
+++ b/src/libraries/System.Drawing.Primitives/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,6 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "T:System.Drawing.ColorTable")]
diff --git a/src/libraries/System.Drawing.Primitives/src/System.Drawing.Primitives.csproj b/src/libraries/System.Drawing.Primitives/src/System.Drawing.Primitives.csproj
index be4e03afc7445d..7d8585f5da4f97 100644
--- a/src/libraries/System.Drawing.Primitives/src/System.Drawing.Primitives.csproj
+++ b/src/libraries/System.Drawing.Primitives/src/System.Drawing.Primitives.csproj
@@ -17,6 +17,7 @@
     <Reference Include="Microsoft.Win32.SystemEvents" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Drawing\KnownColorNames.cs" />
     <Compile Include="System\Drawing\Point.cs" />
     <Compile Include="System\Drawing\PointF.cs" />
diff --git a/src/libraries/System.Linq.Expressions/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Linq.Expressions/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..6513e0cc45cfe7
--- /dev/null
+++ b/src/libraries/System.Linq.Expressions/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,55 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Dynamic.DynamicObject.MetaDynamic.IsOverridden(System.Reflection.MethodInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Dynamic.Utils.DelegateHelpers.#cctor")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Dynamic.Utils.DelegateHelpers.GetCSharpThunk(System.Type,System.Boolean,System.Reflection.ParameterInfo[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Dynamic.Utils.TypeExtensions.GetAnyStaticMethodValidated(System.Type,System.String,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Dynamic.Utils.TypeUtils.GetInvokeMethod(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Dynamic.Utils.TypeUtils.GetUserDefinedCoercionMethod(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.AssemblyGen.DefineType(System.String,System.Type,System.Reflection.TypeAttributes)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.CompilerScope.ElementBoxStorage.#ctor(System.Linq.Expressions.Compiler.CompilerScope.Storage,System.Int32,System.Linq.Expressions.ParameterExpression)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.ILGen.EmitArray(System.Reflection.Emit.ILGenerator,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.ILGen.EmitGetValue(System.Reflection.Emit.ILGenerator,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.ILGen.EmitGetValueOrDefault(System.Reflection.Emit.ILGenerator,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.ILGen.EmitHasValue(System.Reflection.Emit.ILGenerator,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.ILGen.EmitNonNullableToNullableConversion(System.Reflection.Emit.ILGenerator,System.Type,System.Type,System.Boolean,System.Linq.Expressions.Compiler.ILocalCache)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.ILGen.EmitNullableToNullableConversion(System.Reflection.Emit.ILGenerator,System.Type,System.Type,System.Boolean,System.Linq.Expressions.Compiler.ILocalCache)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.ILGen.TryEmitILConstant(System.Reflection.Emit.ILGenerator,System.Object,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.LambdaCompiler.AddressOf(System.Linq.Expressions.IndexExpression,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.LambdaCompiler.AddressOf(System.Linq.Expressions.MethodCallExpression,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.LambdaCompiler.EmitDynamicExpression(System.Linq.Expressions.Expression)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.LambdaCompiler.EmitGetArrayElement(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.LambdaCompiler.EmitInvocationExpression(System.Linq.Expressions.Expression,System.Linq.Expressions.Compiler.LambdaCompiler.CompilationFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.LambdaCompiler.EmitLift(System.Linq.Expressions.ExpressionType,System.Type,System.Linq.Expressions.MethodCallExpression,System.Linq.Expressions.ParameterExpression[],System.Linq.Expressions.Expression[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.LambdaCompiler.EmitLiftedBinaryArithmetic(System.Linq.Expressions.ExpressionType,System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.LambdaCompiler.EmitSetArrayElement(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.LambdaCompiler.EmitUnary(System.Linq.Expressions.UnaryExpression,System.Linq.Expressions.Compiler.LambdaCompiler.CompilationFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Compiler.LambdaCompiler.EmitUnaryOperator(System.Linq.Expressions.ExpressionType,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.ApplyTypeArgs(System.Reflection.MethodInfo,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.ArrayIndex(System.Linq.Expressions.Expression,System.Collections.Generic.IEnumerable{System.Linq.Expressions.Expression})")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.CheckMethod(System.Reflection.MethodInfo,System.Reflection.MethodInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.Field(System.Linq.Expressions.Expression,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.Field(System.Linq.Expressions.Expression,System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.FindMethod(System.Type,System.String,System.Type[],System.Linq.Expressions.Expression[],System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.FindProperty(System.Type,System.String,System.Linq.Expressions.Expression[],System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.GetProperty(System.Reflection.MethodInfo,System.String,System.Int32)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.New(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.Property(System.Linq.Expressions.Expression,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.Property(System.Linq.Expressions.Expression,System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Expression.PropertyOrField(System.Linq.Expressions.Expression,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.ExpressionStringBuilder.VisitExtension(System.Linq.Expressions.Expression)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Interpreter.CallInstruction.GetArrayAccessor(System.Reflection.MethodInfo,System.Int32)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Interpreter.DefaultValueInstruction.Run(System.Linq.Expressions.Interpreter.InterpretedFrame)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Interpreter.InitializeLocalInstruction.MutableBox.Run(System.Linq.Expressions.Interpreter.InterpretedFrame)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Interpreter.InitializeLocalInstruction.MutableValue.Run(System.Linq.Expressions.Interpreter.InterpretedFrame)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Interpreter.LightCompiler.CompileAddress(System.Linq.Expressions.Expression,System.Int32)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Interpreter.LightCompiler.CompileIndexAssignment(System.Linq.Expressions.BinaryExpression,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Interpreter.LightCompiler.CompileInvocationExpression(System.Linq.Expressions.Expression)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Interpreter.LightCompiler.CompileMultiDimArrayAccess(System.Linq.Expressions.Expression,System.Linq.Expressions.IArgumentProvider,System.Int32)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Interpreter.LightCompiler.EmitIndexGet(System.Linq.Expressions.IndexExpression)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.Expressions.Interpreter.NullableMethodCallInstruction.GetValueOrDefault.Run(System.Linq.Expressions.Interpreter.InterpretedFrame)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Runtime.CompilerServices.CallSite`1.CreateCustomUpdateDelegate(System.Reflection.MethodInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Runtime.CompilerServices.CallSite`1.MakeUpdateDelegate")]
diff --git a/src/libraries/System.Linq.Expressions/src/System.Linq.Expressions.csproj b/src/libraries/System.Linq.Expressions/src/System.Linq.Expressions.csproj
index 07d0cebd1746ed..b3c398308ca7b9 100644
--- a/src/libraries/System.Linq.Expressions/src/System.Linq.Expressions.csproj
+++ b/src/libraries/System.Linq.Expressions/src/System.Linq.Expressions.csproj
@@ -15,6 +15,7 @@
              Link="Common\System\Obsoletions.cs" />
     <Compile Include="$(CommonPath)System\Collections\Generic\ArrayBuilder.cs"
              Link="Common\System\Collections\Generic\ArrayBuilder.cs" />
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Dynamic\Utils\CacheDict.cs" />
     <Compile Include="System\Dynamic\Utils\ContractUtils.cs" />
     <Compile Include="System\Dynamic\Utils\ExpressionUtils.cs" />
diff --git a/src/libraries/System.Linq.Queryable/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Linq.Queryable/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..71b49b6b197a52
--- /dev/null
+++ b/src/libraries/System.Linq.Queryable/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,115 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Aggregate_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Aggregate_TSource_TAccumulate_3(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Aggregate_TSource_TAccumulate_TResult_4(System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.All_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Any_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Any_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Append_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Average_Decimal_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Average_Double_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Average_Int32_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Average_Int64_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Average_NullableDecimal_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Average_NullableDouble_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Average_NullableInt32_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Average_NullableInt64_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Average_NullableSingle_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Average_Single_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Cast_TResult_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Concat_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Contains_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Contains_TSource_3(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Count_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Count_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.DefaultIfEmpty_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.DefaultIfEmpty_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Distinct_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Distinct_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.ElementAtOrDefault_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.ElementAt_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Except_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Except_TSource_3(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.FirstOrDefault_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.FirstOrDefault_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.First_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.First_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.GroupBy_TSource_TKey_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.GroupBy_TSource_TKey_3(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.GroupBy_TSource_TKey_TElement_3(System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.GroupBy_TSource_TKey_TElement_4(System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.GroupBy_TSource_TKey_TElement_TResult_4(System.Type,System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.GroupBy_TSource_TKey_TElement_TResult_5(System.Type,System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.GroupBy_TSource_TKey_TResult_3(System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.GroupBy_TSource_TKey_TResult_4(System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.GroupJoin_TOuter_TInner_TKey_TResult_5(System.Type,System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.GroupJoin_TOuter_TInner_TKey_TResult_6(System.Type,System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Intersect_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Intersect_TSource_3(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Join_TOuter_TInner_TKey_TResult_5(System.Type,System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Join_TOuter_TInner_TKey_TResult_6(System.Type,System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.LastOrDefault_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.LastOrDefault_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Last_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Last_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.LongCount_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.LongCount_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Max_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Max_TSource_TResult_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Min_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Min_TSource_TResult_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.OfType_TResult_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.OrderByDescending_TSource_TKey_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.OrderByDescending_TSource_TKey_3(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.OrderBy_TSource_TKey_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.OrderBy_TSource_TKey_3(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Prepend_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Reverse_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SelectMany_Index_TSource_TCollection_TResult_3(System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SelectMany_Index_TSource_TResult_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SelectMany_TSource_TCollection_TResult_3(System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SelectMany_TSource_TResult_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Select_Index_TSource_TResult_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Select_TSource_TResult_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SequenceEqual_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SequenceEqual_TSource_3(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SingleOrDefault_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SingleOrDefault_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Single_TSource_1(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Single_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SkipLast_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SkipWhile_Index_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.SkipWhile_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Skip_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Sum_Decimal_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Sum_Double_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Sum_Int32_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Sum_Int64_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Sum_NullableDecimal_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Sum_NullableDouble_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Sum_NullableInt32_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Sum_NullableInt64_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Sum_NullableSingle_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Sum_Single_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.TakeLast_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.TakeWhile_Index_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.TakeWhile_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Take_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.ThenByDescending_TSource_TKey_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.ThenByDescending_TSource_TKey_3(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.ThenBy_TSource_TKey_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.ThenBy_TSource_TKey_3(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Union_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Union_TSource_3(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Where_Index_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Where_TSource_2(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Zip_TFirst_TSecond_2(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.CachedReflectionInfo.Zip_TFirst_TSecond_TResult_3(System.Type,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.EnumerableRewriter.ArgsMatch(System.Reflection.MethodInfo,System.Collections.ObjectModel.ReadOnlyCollection{System.Linq.Expressions.Expression},System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.EnumerableRewriter.FindEnumerableMethod(System.String,System.Collections.ObjectModel.ReadOnlyCollection{System.Linq.Expressions.Expression},System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.EnumerableRewriter.FindMethod(System.Type,System.String,System.Collections.ObjectModel.ReadOnlyCollection{System.Linq.Expressions.Expression},System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Linq.TypeHelper.GetStaticMethods(System.Type)")]
diff --git a/src/libraries/System.Linq.Queryable/src/System.Linq.Queryable.csproj b/src/libraries/System.Linq.Queryable/src/System.Linq.Queryable.csproj
index a531c2e8494096..3a7afcb3071881 100644
--- a/src/libraries/System.Linq.Queryable/src/System.Linq.Queryable.csproj
+++ b/src/libraries/System.Linq.Queryable/src/System.Linq.Queryable.csproj
@@ -6,6 +6,7 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Linq\CachedReflection.cs" />
     <Compile Include="System\Linq\EnumerableExecutor.cs" />
     <Compile Include="System\Linq\EnumerableQuery.cs" />
diff --git a/src/libraries/System.Net.Http.Json/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Net.Http.Json/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..d6723ebdd7edb6
--- /dev/null
+++ b/src/libraries/System.Net.Http.Json/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,8 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Net.Http.Json.HttpContentJsonExtensions.<ReadFromJsonAsyncCore>d__2.MoveNext")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Net.Http.Json.HttpContentJsonExtensions.<ReadFromJsonAsyncCore>d__3`1.MoveNext")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Net.Http.Json.JsonContent.<SerializeToStreamAsyncCore>d__18.MoveNext")]
diff --git a/src/libraries/System.Net.Http.Json/src/System.Net.Http.Json.csproj b/src/libraries/System.Net.Http.Json/src/System.Net.Http.Json.csproj
index ee6e5c6a9af48c..02e829d3fd9fc0 100644
--- a/src/libraries/System.Net.Http.Json/src/System.Net.Http.Json.csproj
+++ b/src/libraries/System.Net.Http.Json/src/System.Net.Http.Json.csproj
@@ -16,6 +16,7 @@
     <Compile Include="System\Net\Http\Json\JsonContent.cs" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Net\Http\Json\HttpContentJsonExtensions.netcoreapp.cs" />
     <Compile Include="System\Net\Http\Json\JsonContent.netcoreapp.cs" />
     <Reference Include="System.Net.Mail" />
diff --git a/src/libraries/System.Net.Http/src/ILLink/ILLink.Suppressions.cs b/src/libraries/System.Net.Http/src/ILLink/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..b437b3f042d106
--- /dev/null
+++ b/src/libraries/System.Net.Http/src/ILLink/ILLink.Suppressions.cs
@@ -0,0 +1,6 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Net.Security.SslClientAuthenticationOptionsExtensions.ShallowClone(System.Net.Security.SslClientAuthenticationOptions)")]
diff --git a/src/libraries/System.Net.Http/src/System.Net.Http.csproj b/src/libraries/System.Net.Http/src/System.Net.Http.csproj
index e6c23001804d4c..0083c090f9972a 100644
--- a/src/libraries/System.Net.Http/src/System.Net.Http.csproj
+++ b/src/libraries/System.Net.Http/src/System.Net.Http.csproj
@@ -20,6 +20,7 @@
   </PropertyGroup>
   <ItemGroup>
     <ILLinkSubstitutionsXmls Include="$(ILLinkDirectory)ILLink.Substitutions.xml" />
+    <Compile Include="$(ILLinkDirectory)ILLink.Suppressions.cs" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/libraries/System.ObjectModel/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.ObjectModel/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..278ffded1b78fc
--- /dev/null
+++ b/src/libraries/System.ObjectModel/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,6 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Windows.Markup.ValueSerializerAttribute.get_ValueSerializerType")]
diff --git a/src/libraries/System.ObjectModel/src/System.ObjectModel.csproj b/src/libraries/System.ObjectModel/src/System.ObjectModel.csproj
index b531e567ae7cac..7f53abf100f6f6 100644
--- a/src/libraries/System.ObjectModel/src/System.ObjectModel.csproj
+++ b/src/libraries/System.ObjectModel/src/System.ObjectModel.csproj
@@ -6,6 +6,7 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Collections\Generic\DebugView.cs" />
     <Compile Include="System\Collections\Specialized\INotifyCollectionChanged.cs" />
     <Compile Include="System\Collections\Specialized\NotifyCollectionChangedAction.cs" />
diff --git a/src/libraries/System.Private.CoreLib/src/System/ComponentModel/DefaultValueAttribute.cs b/src/libraries/System.Private.CoreLib/src/System/ComponentModel/DefaultValueAttribute.cs
index 1d96a8bb75ecea..e060b5405a3486 100644
--- a/src/libraries/System.Private.CoreLib/src/System/ComponentModel/DefaultValueAttribute.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/ComponentModel/DefaultValueAttribute.cs
@@ -57,38 +57,38 @@ public DefaultValueAttribute(Type type, string? value)
                 {
                     _value = Convert.ChangeType(value, type, CultureInfo.InvariantCulture);
                 }
+            }
+            catch
+            {
+            }
+        }
 
-                // Looking for ad hoc created TypeDescriptor.ConvertFromInvariantString(Type, string)
-                static bool TryConvertFromInvariantString(Type? typeToConvert, string? stringValue, out object? conversionResult)
-                {
-                    conversionResult = null;
-
-                    // lazy init reflection objects
-                    if (s_convertFromInvariantString == null)
-                    {
-                        Type? typeDescriptorType = Type.GetType("System.ComponentModel.TypeDescriptor, System.ComponentModel.TypeConverter", throwOnError: false);
-                        MethodInfo? mi = typeDescriptorType?.GetMethod("ConvertFromInvariantString", BindingFlags.NonPublic | BindingFlags.Static);
-                        Volatile.Write(ref s_convertFromInvariantString, mi == null ? new object() : mi.CreateDelegate(typeof(Func<Type, string, object>)));
-                    }
-
-                    if (!(s_convertFromInvariantString is Func<Type?, string?, object> convertFromInvariantString))
-                        return false;
-
-                    try
-                    {
-                        conversionResult = convertFromInvariantString(typeToConvert, stringValue);
-                    }
-                    catch
-                    {
-                        return false;
-                    }
-
-                    return true;
-                }
+        // Looking for ad hoc created TypeDescriptor.ConvertFromInvariantString(Type, string)
+        private static bool TryConvertFromInvariantString(Type? typeToConvert, string? stringValue, out object? conversionResult)
+        {
+            conversionResult = null;
+
+            // lazy init reflection objects
+            if (s_convertFromInvariantString == null)
+            {
+                Type? typeDescriptorType = Type.GetType("System.ComponentModel.TypeDescriptor, System.ComponentModel.TypeConverter", throwOnError: false);
+                MethodInfo? mi = typeDescriptorType?.GetMethod("ConvertFromInvariantString", BindingFlags.NonPublic | BindingFlags.Static);
+                Volatile.Write(ref s_convertFromInvariantString, mi == null ? new object() : mi.CreateDelegate(typeof(Func<Type, string, object>)));
+            }
+
+            if (!(s_convertFromInvariantString is Func<Type?, string?, object> convertFromInvariantString))
+                return false;
+
+            try
+            {
+                conversionResult = convertFromInvariantString(typeToConvert, stringValue);
             }
             catch
             {
+                return false;
             }
+
+            return true;
         }
 
         /// <summary>
diff --git a/src/libraries/System.Private.Xml/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Private.Xml/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..a6dff7635aee6d
--- /dev/null
+++ b/src/libraries/System.Private.Xml/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,59 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Extensions.ExtensionMethods.GetConstructor(System.Type,System.Reflection.BindingFlags,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Extensions.ExtensionMethods.GetMethod(System.Type,System.String,System.Reflection.BindingFlags,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.CodeGenerator.CreateTypeBuilder(System.Reflection.Emit.ModuleBuilder,System.String,System.Reflection.TypeAttributes,System.Type,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.CodeGenerator.GetPropertyMethodFromBaseType(System.Reflection.PropertyInfo,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.EnumModel.get_Constants")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.FieldModel.#ctor(System.Reflection.MemberInfo,System.Type,System.Xml.Serialization.TypeDesc)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionAwareILGen.ILGenForCreateInstance(System.Xml.Serialization.CodeGenerator,System.Type,System.Type,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionAwareILGen.ILGenForCreateInstance(System.Xml.Serialization.CodeGenerator,System.Type,System.Type,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionAwareILGen.WriteLocalDecl(System.String,System.Xml.Serialization.SourceInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionXmlSerializationHelper.GetMember(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionXmlSerializationReader.<>c__DisplayClass54_1.{WriteLiteralStructMethod}b__3(System.Object)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionXmlSerializationReader.AddObjectsIntoTargetCollection(System.Object,System.Collections.Generic.List{System.Object},System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionXmlSerializationReader.FindDefaultConstructor(System.Reflection.TypeInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionXmlSerializationReader.GetSetMemberValueDelegate(System.Object,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionXmlSerializationReader.ReflectionCreateObject(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionXmlSerializationReader.WriteLiteralStructMethod(System.Xml.Serialization.StructMapping,System.Boolean,System.Boolean,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionXmlSerializationReader.WriteNullableMethod(System.Xml.Serialization.NullableMapping,System.Boolean,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionXmlSerializationWriter.WriteStructMethod(System.Xml.Serialization.StructMapping,System.String,System.String,System.Object,System.Boolean,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.SerializableMapping.RetrieveSerializableSchema")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.StructModel.GetMemberInfos")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.TempAssembly.GetMethodFromType(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Xml.Serialization.TempAssembly.GetTypeFromAssembly(System.Reflection.Assembly,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.TempAssembly.LoadGeneratedAssembly(System.Type,System.String,System.Xml.Serialization.XmlSerializerImplementation@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Xml.Serialization.TempAssembly.LoadGeneratedAssembly(System.Type,System.String,System.Xml.Serialization.XmlSerializerImplementation@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.TempAssembly.get_Contract")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.TypeExtensions.TryConvertTo(System.Type,System.Object,System.Object@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.TypeScope.GetDefaultIndexer(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.TypeScope.GetEnumeratorElementType(System.Type,System.Xml.Serialization.TypeFlags@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.TypeScope.ShouldBeReplaced(System.Reflection.MemberInfo,System.Type,System.Reflection.MemberInfo@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Xml.Serialization.XmlAttributes.get_IgnoreAttribute")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.XmlReflectionImporter.GetChoiceIdentifierType(System.Xml.Serialization.XmlChoiceIdentifierAttribute,System.Xml.Serialization.StructModel,System.Boolean,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.XmlSerializationReaderILGen.WriteSourceEnd(System.String,System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.XmlSerializationWriterILGen.WriteArrayItems(System.Xml.Serialization.ElementAccessor[],System.Xml.Serialization.TextAccessor,System.Xml.Serialization.ChoiceIdentifierAccessor,System.Xml.Serialization.TypeDesc,System.String,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.IlGen.IteratorDescriptor.PushValue")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.IlGen.StorageDescriptor.Current(System.Reflection.Emit.LocalBuilder,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.IlGen.XmlILConstructors.GetConstructor(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.IlGen.XmlILConstructors.GetConstructor(System.Type,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.IlGen.XmlILMethods.GetMethod(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.IlGen.XmlILMethods.GetMethod(System.Type,System.String,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.IlGen.XmlILModule.BakeMethods")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.IlGen.XmlILStorageMethods.#ctor(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.Runtime.EarlyBoundInfo.#ctor(System.String,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.Runtime.XmlExtensionFunction.Bind")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.Runtime.XmlExtensionFunction.CanBind")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.Runtime.XsltMethods.GetMethod(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.Runtime.XsltMethods.GetMethod(System.Type,System.String,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.XslCompiledTransform.Load(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.XsltOld.Processor.#ctor(System.Xml.XPath.XPathNavigator,System.Xml.Xsl.XsltArgumentList,System.Xml.XmlResolver,System.Xml.Xsl.XsltOld.Stylesheet,System.Collections.Generic.List{System.Xml.Xsl.XsltOld.TheQuery},System.Xml.Xsl.XsltOld.RootAction,System.Xml.Xsl.XsltOld.Debugger.IXsltDebugger)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Xsl.XsltOld.XsltCompileContext.GetExtentionMethod(System.String,System.String,System.Xml.XPath.XPathResultType[],System.Object@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.Compiler.AddImport(System.Type,System.Collections.Hashtable)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionAwareCodeGen.WriteMappingInfo(System.Xml.Serialization.TypeMapping,System.String,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionAwareCodeGen.WriteMemberInfo(System.Type,System.String,System.String,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.XmlSerializationWriterCodeGen.WriteCheckDefault(System.Xml.Serialization.TypeMapping,System.String,System.Object,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Xml.Serialization.ReflectionXmlSerializationReader.<>c__DisplayClass54_1.<WriteLiteralStructMethod>b__3(System.Object)")]
diff --git a/src/libraries/System.Private.Xml/src/System.Private.Xml.csproj b/src/libraries/System.Private.Xml/src/System.Private.Xml.csproj
index 01dcb093e6e2d0..c2b79759efceb2 100644
--- a/src/libraries/System.Private.Xml/src/System.Private.Xml.csproj
+++ b/src/libraries/System.Private.Xml/src/System.Private.Xml.csproj
@@ -7,6 +7,7 @@
     <TargetFrameworks>$(NetCoreAppCurrent)-Windows_NT;$(NetCoreAppCurrent)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="$(CommonPath)System\Text\StringBuilderCache.cs"
              Link="Common\System\StringBuilderCache.cs" />
     <Compile Include="$(CommonPath)System\Marvin.cs"
diff --git a/src/libraries/System.Reflection.DispatchProxy/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Reflection.DispatchProxy/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..21d075241a06bc
--- /dev/null
+++ b/src/libraries/System.Reflection.DispatchProxy/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,12 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.DispatchProxyGenerator.CreateProxyInstance(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.DispatchProxyGenerator.GenerateProxyType(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.DispatchProxyGenerator.Invoke(System.Object[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.DispatchProxyGenerator.ProxyAssembly.CreateProxy(System.String,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.DispatchProxyGenerator.ProxyBuilder.AddInterfaceImpl(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.DispatchProxyGenerator.ProxyBuilder.Complete")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.IgnoreAccessChecksToAttributeBuilder.AddToModule(System.Reflection.Emit.ModuleBuilder)")]
diff --git a/src/libraries/System.Reflection.DispatchProxy/src/System.Reflection.DispatchProxy.csproj b/src/libraries/System.Reflection.DispatchProxy/src/System.Reflection.DispatchProxy.csproj
index 80891e3e0192b4..e30101de379ec0 100644
--- a/src/libraries/System.Reflection.DispatchProxy/src/System.Reflection.DispatchProxy.csproj
+++ b/src/libraries/System.Reflection.DispatchProxy/src/System.Reflection.DispatchProxy.csproj
@@ -5,6 +5,14 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
+  <!-- DesignTimeBuild requires all the TargetFramework Derived Properties to not be present in the first property group. -->
+  <PropertyGroup>
+    <GeneratePlatformNotSupportedAssemblyMessage Condition="'$(TargetFramework)' == 'netstandard2.0'">SR.PlatformNotSupported_ReflectionDispatchProxy</GeneratePlatformNotSupportedAssemblyMessage>
+  </PropertyGroup>
+  <!-- <ItemGroup Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
+  </ItemGroup> -->
+  <ItemGroup Condition="'$(TargetFramework)' != 'netstandard2.0'">
     <Compile Include="System\Reflection\DispatchProxy.cs" />
     <Compile Include="System\Reflection\DispatchProxyGenerator.cs" />
     <Compile Include="$(CommonPath)System\Reflection\Emit\IgnoreAccessChecksToAttributeBuilder.cs"
diff --git a/src/libraries/System.Reflection.TypeExtensions/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Reflection.TypeExtensions/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..414c5cab429e6b
--- /dev/null
+++ b/src/libraries/System.Reflection.TypeExtensions/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,37 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetConstructor(System.Type,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetConstructors(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetConstructors(System.Type,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetDefaultMembers(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetEvent(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetEvent(System.Type,System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetEvents(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetEvents(System.Type,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetField(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetField(System.Type,System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetFields(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetFields(System.Type,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetMember(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetMember(System.Type,System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetMembers(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetMembers(System.Type,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetMethod(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetMethod(System.Type,System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetMethod(System.Type,System.String,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetMethods(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetMethods(System.Type,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetNestedType(System.Type,System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetNestedTypes(System.Type,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetProperties(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetProperties(System.Type,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetProperty(System.Type,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetProperty(System.Type,System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetProperty(System.Type,System.String,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.TypeExtensions.GetProperty(System.Type,System.String,System.Type,System.Type[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.AssemblyExtensions.GetExportedTypes(System.Reflection.Assembly)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Reflection.AssemblyExtensions.GetTypes(System.Reflection.Assembly)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Runtime.Serialization.FormatterServices.GetSafeUninitializedObject(System.Type)")]
diff --git a/src/libraries/System.Reflection.TypeExtensions/src/System.Reflection.TypeExtensions.csproj b/src/libraries/System.Reflection.TypeExtensions/src/System.Reflection.TypeExtensions.csproj
index 058466cbef4307..404b01a47bfa29 100644
--- a/src/libraries/System.Reflection.TypeExtensions/src/System.Reflection.TypeExtensions.csproj
+++ b/src/libraries/System.Reflection.TypeExtensions/src/System.Reflection.TypeExtensions.csproj
@@ -7,6 +7,7 @@
     <ExcludeCurrentNetCoreAppFromPackage>true</ExcludeCurrentNetCoreAppFromPackage>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Reflection\Requires.cs" />
     <Compile Include="System\Reflection\TypeExtensions.cs" />
   </ItemGroup>
diff --git a/src/libraries/System.Runtime.InteropServices/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Runtime.InteropServices/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..688ec33cd86a4c
--- /dev/null
+++ b/src/libraries/System.Runtime.InteropServices/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,6 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "T:System.Runtime.InteropServices.ComAwareEventInfo")]
diff --git a/src/libraries/System.Runtime.InteropServices/src/System.Runtime.InteropServices.csproj b/src/libraries/System.Runtime.InteropServices/src/System.Runtime.InteropServices.csproj
index 213c5439847de2..9f96f2ff62c709 100644
--- a/src/libraries/System.Runtime.InteropServices/src/System.Runtime.InteropServices.csproj
+++ b/src/libraries/System.Runtime.InteropServices/src/System.Runtime.InteropServices.csproj
@@ -7,6 +7,7 @@
     <TargetFrameworks>$(NetCoreAppCurrent)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Runtime\CompilerServices\IDispatchConstantAttribute.cs" />
     <Compile Include="System\Runtime\CompilerServices\IUnknownConstantAttribute.cs" />
     <Compile Include="System\Runtime\InteropServices\ComTypes\ADVF.cs" />
diff --git a/src/libraries/System.Runtime.Serialization.Formatters/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Runtime.Serialization.Formatters/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..76056a961055a0
--- /dev/null
+++ b/src/libraries/System.Runtime.Serialization.Formatters/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,16 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2020", Scope = "member", Target = "M:System.Runtime.Serialization.FormatterServices.GetUninitializedObject(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Runtime.Serialization.FormatterServices.GetTypeFromAssembly(System.Reflection.Assembly,System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Runtime.Serialization.FormatterServices.InternalGetSerializableMembers(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Runtime.Serialization.ObjectManager.DoValueTypeFixup(System.Reflection.FieldInfo,System.Runtime.Serialization.ObjectHolder,System.Object)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Runtime.Serialization.FormatterServices.GetSerializableFields(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Runtime.Serialization.ObjectManager.GetDeserializationConstructor(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Runtime.Serialization.SerializationEvents.GetMethodsWithAttribute(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Runtime.Serialization.Formatters.Binary.ObjectReader.ParseObject(System.Runtime.Serialization.Formatters.Binary.ParseRecord)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "T:System.Runtime.Serialization.Formatters.Binary.ObjectReader")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Runtime.Serialization.Formatters.Binary.ObjectReader.TopLevelAssemblyTypeResolver.ResolveType(System.Reflection.Assembly,System.String,System.Boolean)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Runtime.Serialization.FormatterServices.GetSafeUninitializedObject(System.Type)")]
diff --git a/src/libraries/System.Runtime.Serialization.Formatters/src/System.Runtime.Serialization.Formatters.csproj b/src/libraries/System.Runtime.Serialization.Formatters/src/System.Runtime.Serialization.Formatters.csproj
index 6dd50fdba5e240..7ebab99f269ebf 100644
--- a/src/libraries/System.Runtime.Serialization.Formatters/src/System.Runtime.Serialization.Formatters.csproj
+++ b/src/libraries/System.Runtime.Serialization.Formatters/src/System.Runtime.Serialization.Formatters.csproj
@@ -15,6 +15,7 @@
     <ILLinkSubstitutionsXmls Include="$(ILLinkDirectory)ILLink.Substitutions.xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System.Runtime.Serialization.Formatters.TypeForwards.cs" />
     <Compile Include="System\Runtime\Serialization\DeserializationEventHandler.cs" />
     <Compile Include="System\Runtime\Serialization\Formatter.cs" />
diff --git a/src/libraries/System.Security.Cryptography.Algorithms/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Security.Cryptography.Algorithms/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..706b012f46af66
--- /dev/null
+++ b/src/libraries/System.Security.Cryptography.Algorithms/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Security.Cryptography.CryptoConfig.CreateFromName(System.String,System.Object[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Security.Cryptography.XmlKeyHelper.ParseState.Functions.#cctor")]
diff --git a/src/libraries/System.Security.Cryptography.Algorithms/src/System.Security.Cryptography.Algorithms.csproj b/src/libraries/System.Security.Cryptography.Algorithms/src/System.Security.Cryptography.Algorithms.csproj
index cf865818cc0c4f..2f5b083490d34a 100644
--- a/src/libraries/System.Security.Cryptography.Algorithms/src/System.Security.Cryptography.Algorithms.csproj
+++ b/src/libraries/System.Security.Cryptography.Algorithms/src/System.Security.Cryptography.Algorithms.csproj
@@ -589,6 +589,9 @@
     <Compile Include="$(CommonPath)Interop\Unix\Interop.Libraries.cs"
              Link="Common\Interop\Unix\Interop.Libraries.cs" />
   </ItemGroup>
+  <ItemGroup Condition="$(TargetFramework.StartsWith('$(NetCoreAppCurrent)'))">
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
+  </ItemGroup>
   <ItemGroup>
     <Reference Include="System.Collections" />
     <Reference Include="System.Collections.Concurrent" />
diff --git a/src/libraries/System.Security.Cryptography.Primitives/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Security.Cryptography.Primitives/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..6f925ef8fc9160
--- /dev/null
+++ b/src/libraries/System.Security.Cryptography.Primitives/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,6 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Security.Cryptography.CryptoConfigForwarder.BindCreateFromName")]
diff --git a/src/libraries/System.Security.Cryptography.Primitives/src/System.Security.Cryptography.Primitives.csproj b/src/libraries/System.Security.Cryptography.Primitives/src/System.Security.Cryptography.Primitives.csproj
index 13998e38436f4d..9e40f49e0f1ff7 100644
--- a/src/libraries/System.Security.Cryptography.Primitives/src/System.Security.Cryptography.Primitives.csproj
+++ b/src/libraries/System.Security.Cryptography.Primitives/src/System.Security.Cryptography.Primitives.csproj
@@ -10,6 +10,7 @@
     <GeneratePlatformNotSupportedAssemblyMessage Condition="'$(TargetsBrowser)' == 'true'">SR.SystemSecurityCryptographyPrimitives_PlatformNotSupported</GeneratePlatformNotSupportedAssemblyMessage>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Security\Cryptography\AsymmetricAlgorithm.cs" />
     <Compile Include="System\Security\Cryptography\CipherMode.cs" />
     <Compile Include="System\Security\Cryptography\CryptoConfigForwarder.cs" />
diff --git a/src/libraries/System.Text.Json/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Text.Json/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..f1000705246e2c
--- /dev/null
+++ b/src/libraries/System.Text.Json/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,16 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.Json.JsonClassInfo.#ctor(System.Type,System.Text.Json.JsonSerializerOptions)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.Json.Serialization.Converters.ObjectConverterFactory.GetDeserializationConstructor(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Text.Json.Serialization.IEnumerableConverterFactoryHelpers.GetImmutableDictionaryConstructingType(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.Json.Serialization.IEnumerableConverterFactoryHelpers.GetImmutableDictionaryCreateRangeMethod(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:System.Text.Json.Serialization.IEnumerableConverterFactoryHelpers.GetImmutableEnumerableConstructingType(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.Json.Serialization.IEnumerableConverterFactoryHelpers.GetImmutableEnumerableCreateRangeMethod(System.Type,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.Json.Serialization.IEnumerableConverterFactoryHelpers.GetTypeIfExists(System.String)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.Json.Serialization.ReflectionEmitMemberAccessor.CreateAddMethodDelegate(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.Json.Serialization.ReflectionEmitMemberAccessor.CreateConstructor(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.Json.Serialization.ReflectionEmitMemberAccessor.CreateParameterizedConstructor(System.Reflection.ConstructorInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.Json.Serialization.ReflectionEmitMemberAccessor.CreateParameterizedConstructor(System.Reflection.ConstructorInfo,System.Type,System.Type,System.Type,System.Type)")]
diff --git a/src/libraries/System.Text.Json/src/System.Text.Json.csproj b/src/libraries/System.Text.Json/src/System.Text.Json.csproj
index 64d2b0562b0e1a..e4930419c1face 100644
--- a/src/libraries/System.Text.Json/src/System.Text.Json.csproj
+++ b/src/libraries/System.Text.Json/src/System.Text.Json.csproj
@@ -18,6 +18,7 @@
     <NoWarn Condition="'$(TargetFramework)' == 'netstandard2.0' or $(TargetFramework.StartsWith('net4'))">$(NoWarn);nullable</NoWarn>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="$(CommonPath)System\HexConverter.cs" Link="Common\System\HexConverter.cs" />
     <Compile Include="$(CommonPath)System\Text\Json\PooledByteBufferWriter.cs" Link="Common\System\Text\Json\PooledByteBufferWriter.cs" />
     <Compile Include="System\Text\Json\BitStack.cs" />
diff --git a/src/libraries/System.Text.RegularExpressions/src/ILLinker/ILLink.Suppressions.cs b/src/libraries/System.Text.RegularExpressions/src/ILLinker/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..b5b13be7d10b07
--- /dev/null
+++ b/src/libraries/System.Text.RegularExpressions/src/ILLinker/ILLink.Suppressions.cs
@@ -0,0 +1,9 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.RegularExpressions.RegexAssemblyCompiler.DefineType(System.Reflection.Emit.ModuleBuilder,System.String,System.Boolean,System.Boolean,System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.RegularExpressions.RegexAssemblyCompiler.GenerateCreateInstance(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.RegularExpressions.RegexAssemblyCompiler.GenerateRegexDefaultCtor(System.String,System.Text.RegularExpressions.RegexOptions,System.Type,System.Text.RegularExpressions.RegexCode,System.TimeSpan)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Text.RegularExpressions.RegexCompiler.#cctor")]
diff --git a/src/libraries/System.Text.RegularExpressions/src/System.Text.RegularExpressions.csproj b/src/libraries/System.Text.RegularExpressions/src/System.Text.RegularExpressions.csproj
index f323acb4be5010..8180fefda6ca3c 100644
--- a/src/libraries/System.Text.RegularExpressions/src/System.Text.RegularExpressions.csproj
+++ b/src/libraries/System.Text.RegularExpressions/src/System.Text.RegularExpressions.csproj
@@ -6,6 +6,7 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Collections\HashtableExtensions.cs" />
     <Compile Include="System\Collections\Generic\ValueListBuilder.Pop.cs" />
     <Compile Include="System\Text\SegmentStringBuilder.cs" />
diff --git a/src/mono/netcore/System.Private.CoreLib/System.Private.CoreLib.csproj b/src/mono/netcore/System.Private.CoreLib/System.Private.CoreLib.csproj
index 95e1e72845ad16..b7c42107fae9e6 100644
--- a/src/mono/netcore/System.Private.CoreLib/System.Private.CoreLib.csproj
+++ b/src/mono/netcore/System.Private.CoreLib/System.Private.CoreLib.csproj
@@ -155,6 +155,8 @@
 
     <ILLinkLinkAttributesXmls Include="$(ILLinkDirectory)ILLink.LinkAttributes.$(Platform).xml"
                               Condition="Exists('$(ILLinkDirectory)ILLink.LinkAttributes.$(Platform).xml')" />
+    
+    <Compile Include="$(ILLinkDirectory)ILLink.Suppressions.cs" />
   </ItemGroup>
 
   <!-- Sources -->
diff --git a/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Descriptors.xml b/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Descriptors.xml
index 244f9da5b3ac58..7d2a08be08dfe6 100644
--- a/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Descriptors.xml
+++ b/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Descriptors.xml
@@ -223,11 +223,6 @@
 			<field name="m_value"/>
 		</type>
 
-		<!-- domain.c: mono_defaults.int_class -->
-		<type fullname="System.IntPtr">
-			<field name="m_value"/>
-		</type>
-
 		<!-- exception.c (mono_get_exception_invalid_cast) -->
 		<type fullname="System.InvalidCastException">
 			<!-- mono_exception_from_name -->
@@ -276,9 +271,6 @@
 		<!-- mono-mlist.c (managed list): used in threadpool.c and gc.c -->
 		<type fullname="Mono.MonoListItem" preserve="fields" />
 
-		<!-- domain.c: mono_defaults.type_class -->
-		<type fullname="System.MonoType" preserve="nothing" />
-
 		<!-- domain.c: mono_defaults.multicastdelegate_class -->
 		<type fullname="System.MulticastDelegate" preserve="fields" />
 
@@ -420,7 +412,7 @@
 			<!-- marshal.c (mono_marshal_get_synchronized_wrapper) -->
 			<method name="GetTypeFromHandle" />
 			<!-- sre.c (mono_reflection_type_get_underlying_system_type) -->
-			<method name="get_UnderlyingSystemType" feature="sre" />
+			<method name="get_UnderlyingSystemType" />
 		</type>
 
 		<!-- exception.c (mono_get_exception_type_initialization) -->
@@ -455,11 +447,6 @@
 			<field name="m_value"/>
 		</type>
 
-		<!-- domain.c: mono_defaults.uint_class -->
-		<type fullname="System.UIntPtr">
-			<field name="m_value"/>
-		</type>
-
 		<!-- object.c: create_unhandled_exception_eventargs (assert) -->
 		<type fullname="System.UnhandledExceptionEventArgs">
 			<method signature="System.Void .ctor(System.Object,System.Boolean)" />
@@ -520,10 +507,7 @@
 
 		<type fullname="System.Reflection.AssemblyName" preserve="fields" />
 
-		<type fullname="System.Reflection.EventInfo" preserve="fields">
-			<method name="AddEventFrame" />
-			<method name="StaticAddEventAdapterFrame" />
-		</type>
+		<type fullname="System.Reflection.EventInfo" preserve="fields" />
 
 		<!-- reflection.c: mono_method_body_get_object -->
 		<type fullname="System.Reflection.RuntimeExceptionHandlingClause" preserve="fields" >
@@ -580,10 +564,6 @@
 		<type fullname="System.Reflection.ParameterInfo" preserve="fields" />
 		<!-- reflection.c: ves_icall_get_parameter_info -->
 		<type fullname="System.Reflection.RuntimeParameterInfo" >
-			<!-- reflection.c mono_reflection_get_param_info_member_and_pos -->
-			<field name="MemberImpl" />
-			<field name="PositionImpl" />
-			<!-- reflection.c add_parameter_object_to_array -->
 			<method signature="System.Void .ctor(System.String,System.Type,System.Int32,System.Int32,System.Object,System.Reflection.MemberInfo,System.Runtime.InteropServices.MarshalAsAttribute)" />
 		</type>
 
@@ -640,8 +620,6 @@
 		<!-- native-library.c: mono_class_get_native_library_class -->
 		<type fullname="System.Runtime.InteropServices.NativeLibrary">
 			<method name="MonoLoadLibraryCallbackStub" />
-			<method name="MonoResolveUnmanagedDll" />
-			<method name="MonoResolveUnmanagedDllUsingEvent" />
 		</type>
 
 		<!-- domain.c: mono_defaults.monitor_class -->
@@ -660,9 +638,7 @@
 
 		<!-- domain.c: mono_defaults.thread_class -->
 		<!-- FIXME: -->
-		<type fullname="System.Threading.Thread" preserve="fields">
-			<method name="get_CurrentContext" />
-		</type>
+		<type fullname="System.Threading.Thread" preserve="fields" />
 
 		<!-- domain.c: mono_defaults.threadabortexception_class -->
 		<!-- exception.c (mono_get_exception_thread_abort) -->
diff --git a/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Suppressions.cs b/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Suppressions.cs
new file mode 100644
index 00000000000000..161a8be665dbc1
--- /dev/null
+++ b/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Suppressions.cs
@@ -0,0 +1,200 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2001", Scope = "type", Target = "T:Mono.ValueTuple")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2001", Scope = "type", Target = "T:System.Reflection.EventInfo")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "F:System.LazyDebugView`1._lazy")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.AppDomain.GetThreadPrincipal")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.ComponentModel.DefaultValueAttribute.TryConvertFromInvariantString(System.Type,System.String,System.Object@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.StackTrace.TryResolveStateMachineMethod(System.Reflection.MethodBase@,System.Type@)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.EventSource.CreateManifestAndDescriptors(System.Type,System.String,System.Diagnostics.Tracing.EventSource,System.Diagnostics.Tracing.EventManifestOptions)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.EventSource.EnsureDescriptorsInitialized")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.ManifestBuilder.CreateManifestString")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.ManifestBuilder.GetTypeName(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.NullableTypeInfo.#ctor(System.Type,System.Collections.Generic.List{System.Type})")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.NullableTypeInfo.WriteData(System.Diagnostics.Tracing.TraceLoggingDataCollector,System.Diagnostics.Tracing.PropertyValue)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.Statics.GetProperties(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.#ctor(System.Lazy{`0})")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.get_IsValueCreated")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.get_IsValueFaulted")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.get_Mode")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.get_Value")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.CustomAttribute.GetBaseEventDefinition(System.Reflection.RuntimeEventInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.CustomAttribute.GetBasePropertyDefinition(System.Reflection.RuntimePropertyInfo)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.ILGenerator.EmitWriteLine(System.Reflection.Emit.LocalBuilder)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Reflection.Emit.ILGenerator.EmitWriteLine(System.Reflection.FieldInfo)")]
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+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetConstructors(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetEvent(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetEvents")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetEvents(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetField(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetFields(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetMember(System.String,System.Reflection.MemberTypes,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetMembers(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetMethodImpl(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Reflection.CallingConventions,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetMethods(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetNestedType(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetNestedTypes(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetProperties(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.GetPropertyImpl(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Type,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Reflection.TypeDelegator.InvokeMember(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Object,System.Object[],System.Reflection.ParameterModifier[],System.Globalization.CultureInfo,System.String[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetConstructorImpl(System.Reflection.BindingFlags,System.Reflection.Binder,System.Reflection.CallingConventions,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetConstructors(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetEvent(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetEvents(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetField(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetFields(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetMember(System.String,System.Reflection.MemberTypes,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetMembers(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetMethods(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetNestedType(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetNestedTypes(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetProperties(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.RuntimeType.GetPropertyImpl(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Type,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetField(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetFields(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetMember(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetMembers(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetMethod(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetMethod(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetMethods(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetProperties(System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetProperty(System.String,System.Reflection.BindingFlags)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.GetProperty(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Type,System.Type[],System.Reflection.ParameterModifier[])")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2047", Scope = "member", Target = "M:System.Type.InvokeMember(System.String,System.Reflection.BindingFlags,System.Reflection.Binder,System.Object,System.Object[],System.Reflection.ParameterModifier[],System.Globalization.CultureInfo,System.String[])")]

From b3d396b37acce4e7cd8371f2ae0e0da29fc489d3 Mon Sep 17 00:00:00 2001
From: Layomi Akinrinade <laakinri@microsoft.com>
Date: Fri, 10 Jul 2020 18:13:42 -0700
Subject: [PATCH 2/2] Fix up warnings for more configurations

---
 eng/illink.targets                            |  17 ++-
 src/coreclr/crossgen-corelib.proj             |   6 +-
 .../Microsoft.NETCore.ILAsm.pkgproj           |  14 ++-
 .../Microsoft.NETCore.ILDAsm.pkgproj          |  14 ++-
 .../Microsoft.NETCore.TestHost.pkgproj        |  14 ++-
 .../ILLinker/ILLink.Suppressions.cs           |   1 +
 .../tools/aot/crossgen2/CommandLineOptions.cs |   2 +
 .../src/tools/aot/crossgen2/Program.cs        |  12 ++
 .../src/tools/aot/crossgen2/crossgen2.csproj  | 105 +++++++++++-------
 src/coreclr/src/vm/dispatchinfo.cpp           |   4 +-
 src/coreclr/src/vm/mscorlib.h                 |   5 +-
 src/libraries/Native/build-native.proj        |   2 +-
 ...System.Diagnostics.DiagnosticSource.csproj |   2 +-
 .../System.Reflection.DispatchProxy.csproj    |  11 +-
 .../src/System.Text.Json.csproj               |   4 +-
 src/libraries/shims/manual/System.csproj      |   6 +
 src/libraries/shims/manual/System.forwards.cs |   2 +
 src/mono/mono.proj                            |  10 +-
 .../src/ILLink/ILLink.Descriptors.xml         |  28 ++++-
 .../src/ILLink/ILLink.Suppressions.cs         |   1 +
 20 files changed, 182 insertions(+), 78 deletions(-)

diff --git a/eng/illink.targets b/eng/illink.targets
index 2407272a133557..49050257a65cf3 100644
--- a/eng/illink.targets
+++ b/eng/illink.targets
@@ -218,11 +218,18 @@
       <ILLinkArgs Condition="'$(ILLinkKeepDepAttributes)' != 'false'">$(ILLinkArgs) --keep-dep-attributes true</ILLinkArgs>
       <!-- enable verbose output -->
       <ILLinkArgs>$(ILLinkArgs) --verbose</ILLinkArgs>
-      <!-- suppress "error IL2025: Duplicate preserve of" warnings from verbose output,
-           as we need both linker annotations and xml files
-           suppress "error IL2047: All overridden members must have the same DynamicallyAccessedMembersAttribute usage",
-           as we don't add suppression files for ref projects -->
-      <ILLinkArgs>$(ILLinkArgs) --nowarn IL2025;IL2047</ILLinkArgs>
+      <!-- suprress warnings with the following codes:
+           CS0234:  The type or namespace name A does not exist in the namespace B
+           IL2008:  Could not find type A specified in resource B
+           IL2009:  Could not find method A in type B specified in resource C
+           IL2012:  Could not find field A in type B specified in resource C
+           IL2025:  Duplicate preserve of" warnings from verbose output,
+                    as we need both linker annotations and xml files
+           IL2047:  All overridden members must have the same DynamicallyAccessedMembersAttribute,
+                    usage as we don't add suppression files for ref projects
+           MSB3030: Could not copy the file A because it was not found.
+      -->
+      <ILLinkArgs>$(ILLinkArgs) --nowarn IL2008;IL2009;IL2012;IL2025;IL2047</ILLinkArgs>
     </PropertyGroup>
 
     <MakeDir Directories="$(ILLinkTrimInputPath)" />
diff --git a/src/coreclr/crossgen-corelib.proj b/src/coreclr/crossgen-corelib.proj
index bf26cd259a8c5c..88c1f8f8f9dde4 100644
--- a/src/coreclr/crossgen-corelib.proj
+++ b/src/coreclr/crossgen-corelib.proj
@@ -12,12 +12,12 @@
     </ItemGroup>
 
     <PropertyGroup>
-      <_CoreClrBuildScript Condition="$([MSBuild]::IsOsPlatform(Windows))">crossgen-corelib.cmd</_CoreClrBuildScript>
-      <_CoreClrBuildScript Condition="!$([MSBuild]::IsOsPlatform(Windows))">crossgen-corelib.sh</_CoreClrBuildScript>
+      <_CoreClrBuildScript Condition="$([MSBuild]::IsOsPlatform(Windows)) and '$(TargetOs)' == 'Windows_NT'">crossgen-corelib.cmd</_CoreClrBuildScript>
+      <_CoreClrBuildScript Condition="!$([MSBuild]::IsOsPlatform(Windows)) and !$('$(TargetOs)' == 'Windows_NT')">crossgen-corelib.sh</_CoreClrBuildScript>
     </PropertyGroup>
 
     <!-- Use IgnoreStandardErrorWarningFormat because Arcade sets WarnAsError and there's an existing warning in the native build. -->
-    <Exec Command="&quot;$(MSBuildThisFileDirectory)$(_CoreClrBuildScript)&quot; @(_CoreClrBuildArg->'%(Identity)',' ')" />
+    <Exec Condition="'$(_CoreClrBuildScript)' != ''" Command="&quot;$(MSBuildThisFileDirectory)$(_CoreClrBuildScript)&quot; @(_CoreClrBuildArg->'%(Identity)',' ')" />
   </Target>
 
   <Target Name="Restore" />
diff --git a/src/coreclr/src/.nuget/Microsoft.NETCore.ILAsm/Microsoft.NETCore.ILAsm.pkgproj b/src/coreclr/src/.nuget/Microsoft.NETCore.ILAsm/Microsoft.NETCore.ILAsm.pkgproj
index c21e7eaa736b74..1fdd55adce19c7 100644
--- a/src/coreclr/src/.nuget/Microsoft.NETCore.ILAsm/Microsoft.NETCore.ILAsm.pkgproj
+++ b/src/coreclr/src/.nuget/Microsoft.NETCore.ILAsm/Microsoft.NETCore.ILAsm.pkgproj
@@ -1,6 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props))" />
+<Project ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <PackageTargetWindows>false</PackageTargetWindows>
+    <PackageTargetWindows Condition="'$(OS)' == 'Windows_NT' and '$(TargetOs)' == ''">true</PackageTargetWindows>
+  </PropertyGroup>
+
+  <Import Condition="'$(PackageTargetWindows)' == 'true'" Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props))" />
 
   <PropertyGroup Condition="'$(PackageTargetRuntime)' == ''">
     <IsLineupPackage Condition="'$(IsLineupPackage)' == ''">true</IsLineupPackage>
@@ -11,5 +16,8 @@
     <NativeBinary Include="$(BinDir)ilasm$(ApplicationFileExtension)" />
   </ItemGroup>
 
-  <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
+  <Import Condition="'$(PackageTargetWindows)' == 'true'" Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
+
+  <!-- Avoid "There is no target in the project" error. -->
+  <Target Condition="'$(PackageTargetWindows)' == 'false'" Name="Empty" />
 </Project>
diff --git a/src/coreclr/src/.nuget/Microsoft.NETCore.ILDAsm/Microsoft.NETCore.ILDAsm.pkgproj b/src/coreclr/src/.nuget/Microsoft.NETCore.ILDAsm/Microsoft.NETCore.ILDAsm.pkgproj
index ce1739f8d6f582..8f29be470dee8a 100644
--- a/src/coreclr/src/.nuget/Microsoft.NETCore.ILDAsm/Microsoft.NETCore.ILDAsm.pkgproj
+++ b/src/coreclr/src/.nuget/Microsoft.NETCore.ILDAsm/Microsoft.NETCore.ILDAsm.pkgproj
@@ -1,6 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props))" />
+<Project ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <PackageTargetWindows>false</PackageTargetWindows>
+    <PackageTargetWindows Condition="'$(OS)' == 'Windows_NT' and '$(TargetOs)' == ''">true</PackageTargetWindows>
+  </PropertyGroup>
+
+  <Import Condition="'$(PackageTargetWindows)' == 'true'" Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props))" />
 
   <PropertyGroup Condition="'$(PackageTargetRuntime)' == ''">
     <IsLineupPackage Condition="'$(IsLineupPackage)' == ''">true</IsLineupPackage>
@@ -11,5 +16,8 @@
     <NativeBinary Include="$(BinDir)ildasm$(ApplicationFileExtension)" />
   </ItemGroup>
 
-  <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
+  <Import Condition="'$(PackageTargetWindows)' == 'true'" Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
+
+  <!-- Avoid "There is no target in the project" error. -->
+  <Target Condition="'$(PackageTargetWindows)' == 'false'" Name="Empty" />
 </Project>
diff --git a/src/coreclr/src/.nuget/Microsoft.NETCore.TestHost/Microsoft.NETCore.TestHost.pkgproj b/src/coreclr/src/.nuget/Microsoft.NETCore.TestHost/Microsoft.NETCore.TestHost.pkgproj
index 5188a4cae99453..07dd27fe027277 100644
--- a/src/coreclr/src/.nuget/Microsoft.NETCore.TestHost/Microsoft.NETCore.TestHost.pkgproj
+++ b/src/coreclr/src/.nuget/Microsoft.NETCore.TestHost/Microsoft.NETCore.TestHost.pkgproj
@@ -1,6 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props))" />
+<Project ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <PackageTargetWindows>false</PackageTargetWindows>
+    <PackageTargetWindows Condition="'$(OS)' == 'Windows_NT' and '$(TargetOs)' == ''">true</PackageTargetWindows>
+  </PropertyGroup>
+
+  <Import Condition="'$(PackageTargetWindows)' == 'true'" Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props))" />
 
   <PropertyGroup Condition="'$(PackageTargetRuntime)' == ''">
     <IsLineupPackage Condition="'$(IsLineupPackage)' == ''">true</IsLineupPackage>
@@ -11,5 +16,8 @@
     <NativeBinary Include="$(BinDir)corerun$(ApplicationFileExtension)" />
   </ItemGroup>
 
-  <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
+  <Import Condition="'$(PackageTargetWindows)' == 'true'" Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
+
+  <!-- Avoid "There is no target in the project" error. -->
+  <Target Condition="'$(PackageTargetWindows)' == 'false'" Name="Empty" />
 </Project>
diff --git a/src/coreclr/src/System.Private.CoreLib/ILLinker/ILLink.Suppressions.cs b/src/coreclr/src/System.Private.CoreLib/ILLinker/ILLink.Suppressions.cs
index 3729bafd493481..d10ff57e1fa2ed 100644
--- a/src/coreclr/src/System.Private.CoreLib/ILLinker/ILLink.Suppressions.cs
+++ b/src/coreclr/src/System.Private.CoreLib/ILLinker/ILLink.Suppressions.cs
@@ -60,6 +60,7 @@
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.StartupHookProvider.CallStartupHook(System.StartupHookProvider.StartupHookNameOrPath)")]
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.TypeNameParser.ResolveType(System.Reflection.Assembly,System.String[],System.Func{System.Reflection.Assembly,System.String,System.Boolean,System.Type},System.Boolean,System.Boolean,System.Threading.StackCrawlMark@)")]
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.__ComObject.CreateEventProvider(System.RuntimeType)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "T:System.Environment")]
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "T:System.Resources.ResourceReader")]
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2009", Scope = "member", Target = "T:System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1")]
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2026", Scope = "member", Target = "M:Internal.Runtime.InteropServices.ComActivator.FindClassType(System.Guid,System.String,System.String,System.String)")]
diff --git a/src/coreclr/src/tools/aot/crossgen2/CommandLineOptions.cs b/src/coreclr/src/tools/aot/crossgen2/CommandLineOptions.cs
index 5aeae5245e3e53..23fcb71cae3e28 100644
--- a/src/coreclr/src/tools/aot/crossgen2/CommandLineOptions.cs
+++ b/src/coreclr/src/tools/aot/crossgen2/CommandLineOptions.cs
@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if SHOULD_RUN_CROSSGEN
 using System;
 using System.CommandLine;
 using System.IO;
@@ -206,3 +207,4 @@ public static Command RootCommand()
         }
     }
 }
+#endif
\ No newline at end of file
diff --git a/src/coreclr/src/tools/aot/crossgen2/Program.cs b/src/coreclr/src/tools/aot/crossgen2/Program.cs
index be483cbda4819c..375d0bdf44e149 100644
--- a/src/coreclr/src/tools/aot/crossgen2/Program.cs
+++ b/src/coreclr/src/tools/aot/crossgen2/Program.cs
@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+#if SHOULD_RUN_CROSSGEN
 using System;
 using System.Collections.Generic;
 using System.CommandLine;
@@ -664,3 +665,14 @@ private static int InnerMain(CommandLineOptions buildOptions)
         }
     }
 }
+#else
+namespace ILCompiler
+{
+    internal class Program
+    {
+        public static void Main(string[] args)
+        {
+        }
+    }
+}
+#endif
\ No newline at end of file
diff --git a/src/coreclr/src/tools/aot/crossgen2/crossgen2.csproj b/src/coreclr/src/tools/aot/crossgen2/crossgen2.csproj
index 2de5f56821453f..2a5f3c4f5a0fb6 100644
--- a/src/coreclr/src/tools/aot/crossgen2/crossgen2.csproj
+++ b/src/coreclr/src/tools/aot/crossgen2/crossgen2.csproj
@@ -16,30 +16,6 @@
     <Configurations>Debug;Release;Checked</Configurations>
   </PropertyGroup>
 
-  <ItemGroup Label="Embedded Resources">
-    <EmbeddedResource Include="Properties\Resources.resx">
-      <GenerateSource>true</GenerateSource>
-      <ClassName>System.SR</ClassName>
-    </EmbeddedResource>
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\ILCompiler.DependencyAnalysisFramework\ILCompiler.DependencyAnalysisFramework.csproj" />
-    <ProjectReference Include="..\ILCompiler.TypeSystem.ReadyToRun\ILCompiler.TypeSystem.ReadyToRun.csproj" />
-    <ProjectReference Include="..\ILCompiler.ReadyToRun\ILCompiler.ReadyToRun.csproj" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <Compile Include="..\..\Common\CommandLine\CommandLineException.cs" />
-    <Compile Include="..\..\Common\CommandLine\CommandLineHelpers.cs" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="System.CommandLine">
-      <Version>$(SystemCommandLineVersion)</Version>
-    </PackageReference>
-  </ItemGroup>
-
   <PropertyGroup>
     <CrossHostArch></CrossHostArch>
     <CrossHostArch Condition="'$(TargetArchitecture)' == 'arm64' and '$(BuildArchitecture)' == 'x64'">x64</CrossHostArch>
@@ -54,24 +30,69 @@
     <LibraryNameExtension Condition="$([MSBuild]::IsOsPlatform('LINUX'))">.so</LibraryNameExtension>
     <LibraryNameExtension Condition="$([MSBuild]::IsOsPlatform('OSX'))">.dylib</LibraryNameExtension>
 
-    <JitInterfaceLibraryName>$(LibraryNamePrefix)jitinterface$(LibraryNameExtension)</JitInterfaceLibraryName>
+    <DefineConstants Condition="'$(ShouldRunCrossGen)' == 'true'">$(DefineConstants);SHOULD_RUN_CROSSGEN</DefineConstants>
   </PropertyGroup>
 
-  <ItemGroup>
-    <Content Include="$(BinDir)\$(JitInterfaceLibraryName)"
-      CopyToOutputDirectory="PreserveNewest"
-      CopyToPublishDirectory="PreserveNewest"
-      Link="%(FileName)%(Extension)"
-     />
-
-    <Content Include="$(BinDir)\$(NativeArchFolder)$(LibraryNamePrefix)clrjit$(LibraryNameExtension)"
-      CopyToOutputDirectory="PreserveNewest"
-      CopyToPublishDirectory="PreserveNewest"
-      Link="$(LibraryNamePrefix)clrjit-$(TargetSpec)$(LibraryNameExtension)"
-     />
-  </ItemGroup>
-
-  <Target Name="CreateCrossTargetingPackage" AfterTargets="Build" Condition="'$(CrossHostArch)' != ''">
+  <Choose>
+    <When Condition="'$(ShouldRunCrossGen)' == 'true'">
+      <ItemGroup Label="Embedded Resources">
+        <EmbeddedResource Include="Properties\Resources.resx">
+          <GenerateSource>true</GenerateSource>
+          <ClassName>System.SR</ClassName>
+        </EmbeddedResource>
+      </ItemGroup>
+
+      <ItemGroup>
+        <ProjectReference Include="..\ILCompiler.DependencyAnalysisFramework\ILCompiler.DependencyAnalysisFramework.csproj" />
+        <ProjectReference Include="..\ILCompiler.TypeSystem.ReadyToRun\ILCompiler.TypeSystem.ReadyToRun.csproj" />
+        <ProjectReference Include="..\ILCompiler.ReadyToRun\ILCompiler.ReadyToRun.csproj" />
+      </ItemGroup>
+
+      <ItemGroup>
+        <Compile Include="..\..\Common\CommandLine\CommandLineException.cs" />
+        <Compile Include="..\..\Common\CommandLine\CommandLineHelpers.cs" />
+      </ItemGroup>
+
+      <ItemGroup>
+        <PackageReference Include="System.CommandLine">
+          <Version>$(SystemCommandLineVersion)</Version>
+        </PackageReference>
+      </ItemGroup>
+
+      <PropertyGroup>
+        <CrossHostArch></CrossHostArch>
+        <CrossHostArch Condition="'$(TargetArchitecture)' == 'arm64'">x64</CrossHostArch>
+
+        <TargetOSComponent>unix</TargetOSComponent>
+        <TargetOSComponent Condition="'$(TargetOS)' == 'Windows_NT'">win</TargetOSComponent>
+        <TargetSpec>$(TargetOSComponent)-$(TargetArchitecture)</TargetSpec>
+
+        <LibraryNamePrefix>lib</LibraryNamePrefix>
+        <LibraryNamePrefix Condition="$([MSBuild]::IsOsPlatform('WINDOWS'))"></LibraryNamePrefix>
+        <LibraryNameExtension Condition="$([MSBuild]::IsOsPlatform('WINDOWS'))">.dll</LibraryNameExtension>
+        <LibraryNameExtension Condition="$([MSBuild]::IsOsPlatform('LINUX'))">.so</LibraryNameExtension>
+        <LibraryNameExtension Condition="$([MSBuild]::IsOsPlatform('OSX'))">.dylib</LibraryNameExtension>
+
+        <JitInterfaceLibraryName>$(LibraryNamePrefix)jitinterface$(LibraryNameExtension)</JitInterfaceLibraryName>
+      </PropertyGroup>
+
+      <ItemGroup>
+        <Content Include="$(BinDir)\$(JitInterfaceLibraryName)"
+          CopyToOutputDirectory="PreserveNewest"
+          CopyToPublishDirectory="PreserveNewest"
+          Link="%(FileName)%(Extension)"
+        />
+
+        <Content Include="$(BinDir)\$(NativeArchFolder)$(LibraryNamePrefix)clrjit$(LibraryNameExtension)"
+          CopyToOutputDirectory="PreserveNewest"
+          CopyToPublishDirectory="PreserveNewest"
+          Link="$(LibraryNamePrefix)clrjit-$(TargetSpec)$(LibraryNameExtension)"
+        />
+      </ItemGroup>
+    </When>
+  </Choose>
+
+  <Target Name="CreateCrossTargetingPackage" AfterTargets="Build" Condition="'$(CrossHostArch)' != '' and '$(ShouldRunCrossGen)' == 'true'">
 
     <PropertyGroup>
       <CrossPackageFolder>$(BinDir)\$(CrossHostArch)\crossgen2</CrossPackageFolder>
@@ -98,9 +119,9 @@
 
   </Target>
 
-  <Target Name="GenerateDepsJsonFile" Returns="$(ProjectDepsFilePath)" DependsOnTargets="GenerateBuildDependencyFile" />
+  <Target Name="GenerateDepsJsonFile" Returns="$(ProjectDepsFilePath)" DependsOnTargets="GenerateBuildDependencyFile" Condition="'$(ShouldRunCrossGen)' == 'true'" />
 
-  <Target Name="RemoveUnusedFilesFromDepsJson" AfterTargets="ResolveRuntimePackAssets" BeforeTargets="GenerateBuildDependencyFile">
+  <Target Name="RemoveUnusedFilesFromDepsJson" AfterTargets="ResolveRuntimePackAssets" BeforeTargets="GenerateBuildDependencyFile" Condition="'$(ShouldRunCrossGen)' == 'true'">
     <PropertyGroup>
       <StaticLibraryFileExtension>.a</StaticLibraryFileExtension>
       <StaticLibraryFileExtension Condition="'$(TargetOS)' == 'Windows_NT'">.lib</StaticLibraryFileExtension>
diff --git a/src/coreclr/src/vm/dispatchinfo.cpp b/src/coreclr/src/vm/dispatchinfo.cpp
index 883b32c77fd7f1..76ee48ff6a9238 100644
--- a/src/coreclr/src/vm/dispatchinfo.cpp
+++ b/src/coreclr/src/vm/dispatchinfo.cpp
@@ -1602,7 +1602,7 @@ void DispatchInfo::InvokeMemberWorker(DispatchMemberInfo*   pDispMemberInfo,
                         COMPlusThrowHR(DISP_E_BADPARAMCOUNT);
 
                     // Retrieve the method descriptor that will be called on.
-                    MethodDesc *pMD = GetFieldInfoMD(METHOD__FIELD_INFO__GET_VALUE, pObjs->MemberInfo->GetTypeHandle());
+                    MethodDesc *pMD = GetFieldInfoMD(METHOD__FIELD__GET_VALUE, pObjs->MemberInfo->GetTypeHandle());
                     MethodDescCallSite getValue(pMD, &pObjs->MemberInfo);
 
                     // Prepare the arguments that will be passed to Invoke.
@@ -1624,7 +1624,7 @@ void DispatchInfo::InvokeMemberWorker(DispatchMemberInfo*   pDispMemberInfo,
                         COMPlusThrowHR(DISP_E_NONAMEDARGS);
 
                     // Retrieve the method descriptor that will be called on.
-                    MethodDesc *pMD = GetFieldInfoMD(METHOD__FIELD_INFO__SET_VALUE, pObjs->MemberInfo->GetTypeHandle());
+                    MethodDesc *pMD = GetFieldInfoMD(METHOD__FIELD__SET_VALUE, pObjs->MemberInfo->GetTypeHandle());
                     MethodDescCallSite setValue(pMD, &pObjs->MemberInfo);
 
                     // Prepare the arguments that will be passed to Invoke.
diff --git a/src/coreclr/src/vm/mscorlib.h b/src/coreclr/src/vm/mscorlib.h
index 6bfc209b595623..fd2578fcaea82f 100644
--- a/src/coreclr/src/vm/mscorlib.h
+++ b/src/coreclr/src/vm/mscorlib.h
@@ -390,6 +390,8 @@ DEFINE_METHOD(STUBFIELDINFO,        CTOR,                   .ctor,
 #endif
 
 DEFINE_CLASS(FIELD,                 Reflection,             RuntimeFieldInfo)
+DEFINE_METHOD(FIELD,                SET_VALUE,              SetValue,                   IM_Obj_Obj_BindingFlags_Binder_CultureInfo_RetVoid)
+DEFINE_METHOD(FIELD,                GET_VALUE,              GetValue,                   IM_Obj_RetObj)
 
 DEFINE_CLASS(FIELD_HANDLE,          System,                 RuntimeFieldHandle)
 DEFINE_FIELD(FIELD_HANDLE,          M_FIELD,                m_ptr)
@@ -397,8 +399,7 @@ DEFINE_FIELD(FIELD_HANDLE,          M_FIELD,                m_ptr)
 DEFINE_CLASS(I_RT_FIELD_INFO,       System,                 IRuntimeFieldInfo)
 
 DEFINE_CLASS(FIELD_INFO,            Reflection,             FieldInfo)
-DEFINE_METHOD(FIELD_INFO,                SET_VALUE,              SetValue,                   IM_Obj_Obj_BindingFlags_Binder_CultureInfo_RetVoid)
-DEFINE_METHOD(FIELD_INFO,                GET_VALUE,              GetValue,                   IM_Obj_RetObj)
+
 
 DEFINE_CLASS(GUID,                  System,                 Guid)
 
diff --git a/src/libraries/Native/build-native.proj b/src/libraries/Native/build-native.proj
index b0551571adf724..6d13838d1ed306 100644
--- a/src/libraries/Native/build-native.proj
+++ b/src/libraries/Native/build-native.proj
@@ -12,7 +12,7 @@
   </PropertyGroup>
 
   <Target Name="BuildNativeUnix"
-          Condition="'$(TargetOS)' != 'Windows_NT'">
+          Condition="'$(TargetOS)' != 'Windows_NT' and '$(OS)' != 'Windows_NT'">
 
     <PropertyGroup>
       <!--
diff --git a/src/libraries/System.Diagnostics.DiagnosticSource/src/System.Diagnostics.DiagnosticSource.csproj b/src/libraries/System.Diagnostics.DiagnosticSource/src/System.Diagnostics.DiagnosticSource.csproj
index 6ffbe85c4566ad..b6f48c7b64a48d 100644
--- a/src/libraries/System.Diagnostics.DiagnosticSource/src/System.Diagnostics.DiagnosticSource.csproj
+++ b/src/libraries/System.Diagnostics.DiagnosticSource/src/System.Diagnostics.DiagnosticSource.csproj
@@ -22,7 +22,6 @@
     <DefineConstants Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">$(DefineConstants);W3C_DEFAULT_ID_FORMAT</DefineConstants>
   </PropertyGroup>
   <ItemGroup>
-    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Diagnostics\DiagnosticSource.cs" />
     <Compile Include="System\Diagnostics\DiagnosticListener.cs" />
     <Compile Include="System\Diagnostics\DiagnosticSourceEventSource.cs" />
@@ -51,6 +50,7 @@
     <None Include="ActivityUserGuide.md" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == '$(NetCoreAppCurrent)'">
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="System\Diagnostics\LocalAppContextSwitches.cs" />
     <Compile Include="$(CommonPath)System\LocalAppContextSwitches.Common.cs">
       <Link>Common\System\LocalAppContextSwitches.Common.cs</Link>
diff --git a/src/libraries/System.Reflection.DispatchProxy/src/System.Reflection.DispatchProxy.csproj b/src/libraries/System.Reflection.DispatchProxy/src/System.Reflection.DispatchProxy.csproj
index e30101de379ec0..bbca384295e620 100644
--- a/src/libraries/System.Reflection.DispatchProxy/src/System.Reflection.DispatchProxy.csproj
+++ b/src/libraries/System.Reflection.DispatchProxy/src/System.Reflection.DispatchProxy.csproj
@@ -5,14 +5,7 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
-  <!-- DesignTimeBuild requires all the TargetFramework Derived Properties to not be present in the first property group. -->
-  <PropertyGroup>
-    <GeneratePlatformNotSupportedAssemblyMessage Condition="'$(TargetFramework)' == 'netstandard2.0'">SR.PlatformNotSupported_ReflectionDispatchProxy</GeneratePlatformNotSupportedAssemblyMessage>
-  </PropertyGroup>
-  <!-- <ItemGroup Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">
-    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
-  </ItemGroup> -->
-  <ItemGroup Condition="'$(TargetFramework)' != 'netstandard2.0'">
+    <!-- <Compile Include="ILLinker\ILLink.Suppressions.cs" /> -->
     <Compile Include="System\Reflection\DispatchProxy.cs" />
     <Compile Include="System\Reflection\DispatchProxyGenerator.cs" />
     <Compile Include="$(CommonPath)System\Reflection\Emit\IgnoreAccessChecksToAttributeBuilder.cs"
@@ -31,4 +24,4 @@
     <Reference Include="System.Runtime" />
     <Reference Include="System.Threading" />
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/src/libraries/System.Text.Json/src/System.Text.Json.csproj b/src/libraries/System.Text.Json/src/System.Text.Json.csproj
index e4930419c1face..4422087f6e609e 100644
--- a/src/libraries/System.Text.Json/src/System.Text.Json.csproj
+++ b/src/libraries/System.Text.Json/src/System.Text.Json.csproj
@@ -18,7 +18,6 @@
     <NoWarn Condition="'$(TargetFramework)' == 'netstandard2.0' or $(TargetFramework.StartsWith('net4'))">$(NoWarn);nullable</NoWarn>
   </PropertyGroup>
   <ItemGroup>
-    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
     <Compile Include="$(CommonPath)System\HexConverter.cs" Link="Common\System\HexConverter.cs" />
     <Compile Include="$(CommonPath)System\Text\Json\PooledByteBufferWriter.cs" Link="Common\System\Text\Json\PooledByteBufferWriter.cs" />
     <Compile Include="System\Text\Json\BitStack.cs" />
@@ -229,6 +228,9 @@
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' or $(TargetFramework.StartsWith('net4')) or '$(TargetFramework)' == 'netcoreapp3.0'">
     <Compile Include="$(CommonPath)System\Collections\Generic\ReferenceEqualityComparer.cs" Link="Common\System\Collections\Generic\ReferenceEqualityComparer.cs" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">
+    <Compile Include="ILLinker\ILLink.Suppressions.cs" />
+  </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)' or '$(TargetFramework)' == 'netcoreapp3.0'">
     <Reference Include="System.Collections" />
     <Reference Include="System.Diagnostics.Debug" />
diff --git a/src/libraries/shims/manual/System.csproj b/src/libraries/shims/manual/System.csproj
index f88c9ea94c0f5d..b454fb782bf135 100644
--- a/src/libraries/shims/manual/System.csproj
+++ b/src/libraries/shims/manual/System.csproj
@@ -1,4 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+  </PropertyGroup>
+  <!-- DesignTimeBuild requires all the TargetFramework Derived Properties to not be present in the first property group. -->
+  <PropertyGroup>
+    <DefineConstants Condition="'$(TargetOs)' == 'Windows_NT'">$(DefineConstants);BUILDING_WINDOWS</DefineConstants>
+  </PropertyGroup>
   <ItemGroup>
     <Compile Include="System.forwards.cs" />
   </ItemGroup>
diff --git a/src/libraries/shims/manual/System.forwards.cs b/src/libraries/shims/manual/System.forwards.cs
index 7502705da1fc13..4acc764ee8d5cb 100644
--- a/src/libraries/shims/manual/System.forwards.cs
+++ b/src/libraries/shims/manual/System.forwards.cs
@@ -5,6 +5,8 @@
 
 // These types are required for Desktop to Core serialization as they are not covered by GenAPI because they are marked as internal.
 [assembly:System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Collections.Generic.TreeSet<>))]
+#if BUILDING_WINDOWS
 [assembly:System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.IO.Compression.ZLibException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Net.CookieVariant))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedTo(typeof(System.Net.PathList))]
+#endif
diff --git a/src/mono/mono.proj b/src/mono/mono.proj
index a11853b47c527b..a66f9a8be17922 100644
--- a/src/mono/mono.proj
+++ b/src/mono/mono.proj
@@ -13,6 +13,7 @@
     <ScriptExt Condition="'$(OS)' != 'Windows_NT'">.sh</ScriptExt>
     <CoreClrFileName Condition="'$(TargetsWindows)' == 'true'">coreclr.dll</CoreClrFileName>
     <CoreClrFileName Condition="'$(TargetsOSX)' == 'true'">libcoreclr.dylib</CoreClrFileName>
+    <CoreClrFileName Condition="'$(TargetsOSX)' == 'true' and '$(OS)' == 'Windows_NT'">coreclr.dll</CoreClrFileName>
     <CoreClrFileName Condition="'$(CoreClrFileName)' == ''">libcoreclr.so</CoreClrFileName>
     <MonoFileName Condition="'$(TargetsiOS)' == 'true' or '$(TargetstvOS)' == 'true'">libmonosgen-2.0.dylib</MonoFileName>
     <MonoFileName Condition="'$(TargetsAndroid)' == 'true'">libmonosgen-2.0.so</MonoFileName>
@@ -939,6 +940,8 @@
       <_MonoRuntimeFilePath Condition="'$(TargetsWindows)' == 'true' and '$(Platform)' == 'x64'">$(MonoObjDir)x64\Bin\$(Configuration)\mono-2.0-sgen.dll</_MonoRuntimeFilePath>
       <_MonoRuntimeFilePath Condition="'$(TargetsWindows)' == 'true' and '$(Platform)' == 'x86'">$(MonoObjDir)Win32\Bin\$(Configuration)\mono-2.0-sgen.dll</_MonoRuntimeFilePath>
       <_MonoRuntimeFilePath Condition="'$(TargetsOSX)' == 'true'">$(MonoObjDir)mono\mini\.libs\libmonosgen-2.0.dylib</_MonoRuntimeFilePath>
+      <_MonoRuntimeFilePath Condition="'$(TargetsOSX)' == 'true' and '$(OS)' == 'Windows_NT' and '$(Platform)' == 'x64'">$(MonoObjDir)x64\Bin\$(Configuration)\mono-2.0-sgen.dll</_MonoRuntimeFilePath>
+      <_MonoRuntimeFilePath Condition="'$(TargetsOSX)' == 'true' and '$(OS)' == 'Windows_NT' and '$(Platform)' == 'x86'">$(MonoObjDir)Win32\Bin\$(Configuration)\mono-2.0-sgen.dll</_MonoRuntimeFilePath>
       <_MonoRuntimeFilePath Condition="'$(TargetsiOS)' == 'true'">$(MonoObjDir)out\lib\libmonosgen-2.0.dylib</_MonoRuntimeFilePath>
       <_MonoRuntimeFilePath Condition="'$(TargetstvOS)' == 'true'">$(MonoObjDir)out\lib\libmonosgen-2.0.dylib</_MonoRuntimeFilePath>
       <_MonoRuntimeFilePath Condition="'$(TargetsAndroid)' == 'true'">$(MonoObjDir)out\lib\libmonosgen-2.0.so</_MonoRuntimeFilePath>
@@ -1001,7 +1004,12 @@
           SkipUnchangedFiles="true"
           Condition="'$(TargetsiOS)' == 'true' or '$(TargetstvOS)' == 'true' or '$(TargetsAndroid)' == 'true' or '$(TargetsBrowser)' == 'true'"/>
 
-    <Exec Condition="'$(TargetsOSX)' == 'true' or '$(TargetsiOS)' == 'true' or '$(TargetstvOS)' == 'true'" Command="install_name_tool -id @rpath/$(MonoFileName) $(BinDir)$(MonoFileName)" />
+    <PropertyGroup>
+      <TargetsAppleDevice>false</TargetsAppleDevice>
+      <TargetsAppleDevice Condition="'$(TargetsOSX)' == 'true' or '$(TargetsiOS)' == 'true' or '$(TargetstvOS)' == 'true'">true</TargetsAppleDevice>
+    </PropertyGroup>
+
+    <Exec Condition="'$(TargetsAppleDevice)' == 'true' and '$(OS)' == 'osx'" Command="install_name_tool -id @rpath/$(MonoFileName) $(BinDir)$(MonoFileName)" />
   </Target>
 
 </Project>
diff --git a/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Descriptors.xml b/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Descriptors.xml
index 7d2a08be08dfe6..6676e4e7af6152 100644
--- a/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Descriptors.xml
+++ b/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Descriptors.xml
@@ -223,6 +223,11 @@
 			<field name="m_value"/>
 		</type>
 
+		<!-- domain.c: mono_defaults.int_class -->
+		<type fullname="System.IntPtr">
+			<field name="m_value"/>
+		</type>
+
 		<!-- exception.c (mono_get_exception_invalid_cast) -->
 		<type fullname="System.InvalidCastException">
 			<!-- mono_exception_from_name -->
@@ -271,6 +276,9 @@
 		<!-- mono-mlist.c (managed list): used in threadpool.c and gc.c -->
 		<type fullname="Mono.MonoListItem" preserve="fields" />
 
+		<!-- domain.c: mono_defaults.type_class -->
+		<type fullname="System.MonoType" preserve="nothing" />
+
 		<!-- domain.c: mono_defaults.multicastdelegate_class -->
 		<type fullname="System.MulticastDelegate" preserve="fields" />
 
@@ -447,6 +455,11 @@
 			<field name="m_value"/>
 		</type>
 
+		<!-- domain.c: mono_defaults.uint_class -->
+		<type fullname="System.UIntPtr">
+			<field name="m_value"/>
+		</type>
+
 		<!-- object.c: create_unhandled_exception_eventargs (assert) -->
 		<type fullname="System.UnhandledExceptionEventArgs">
 			<method signature="System.Void .ctor(System.Object,System.Boolean)" />
@@ -507,7 +520,10 @@
 
 		<type fullname="System.Reflection.AssemblyName" preserve="fields" />
 
-		<type fullname="System.Reflection.EventInfo" preserve="fields" />
+		<type fullname="System.Reflection.EventInfo" preserve="fields">
+			<method name="AddEventFrame" />
+			<method name="StaticAddEventAdapterFrame" />
+		</type>
 
 		<!-- reflection.c: mono_method_body_get_object -->
 		<type fullname="System.Reflection.RuntimeExceptionHandlingClause" preserve="fields" >
@@ -564,6 +580,10 @@
 		<type fullname="System.Reflection.ParameterInfo" preserve="fields" />
 		<!-- reflection.c: ves_icall_get_parameter_info -->
 		<type fullname="System.Reflection.RuntimeParameterInfo" >
+			<!-- reflection.c mono_reflection_get_param_info_member_and_pos -->
+			<field name="MemberImpl" />
+			<field name="PositionImpl" />
+			<!-- reflection.c add_parameter_object_to_array -->
 			<method signature="System.Void .ctor(System.String,System.Type,System.Int32,System.Int32,System.Object,System.Reflection.MemberInfo,System.Runtime.InteropServices.MarshalAsAttribute)" />
 		</type>
 
@@ -620,6 +640,8 @@
 		<!-- native-library.c: mono_class_get_native_library_class -->
 		<type fullname="System.Runtime.InteropServices.NativeLibrary">
 			<method name="MonoLoadLibraryCallbackStub" />
+			<method name="MonoResolveUnmanagedDll" />
+			<method name="MonoResolveUnmanagedDllUsingEvent" />
 		</type>
 
 		<!-- domain.c: mono_defaults.monitor_class -->
@@ -638,7 +660,9 @@
 
 		<!-- domain.c: mono_defaults.thread_class -->
 		<!-- FIXME: -->
-		<type fullname="System.Threading.Thread" preserve="fields" />
+		<type fullname="System.Threading.Thread" preserve="fields">
+			<method name="get_CurrentContext" />
+		</type>
 
 		<!-- domain.c: mono_defaults.threadabortexception_class -->
 		<!-- exception.c (mono_get_exception_thread_abort) -->
diff --git a/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Suppressions.cs b/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Suppressions.cs
index 161a8be665dbc1..547fb7e1a7d0e9 100644
--- a/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Suppressions.cs
+++ b/src/mono/netcore/System.Private.CoreLib/src/ILLink/ILLink.Suppressions.cs
@@ -16,6 +16,7 @@
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.NullableTypeInfo.#ctor(System.Type,System.Collections.Generic.List{System.Type})")]
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.NullableTypeInfo.WriteData(System.Diagnostics.Tracing.TraceLoggingDataCollector,System.Diagnostics.Tracing.PropertyValue)")]
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.Diagnostics.Tracing.Statics.GetProperties(System.Type)")]
+[assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "T:System.Environment")]
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.#ctor(System.Lazy{`0})")]
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.get_IsValueCreated")]
 [assembly: UnconditionalSuppressMessage ("ILLinker", "IL2006", Scope = "member", Target = "M:System.LazyDebugView`1.get_IsValueFaulted")]