diff --git a/pkg/Microsoft.Private.PackageBaseline/packageIndex.json b/pkg/Microsoft.Private.PackageBaseline/packageIndex.json
index 8dc86f8bc8b6..51c6beca4f0f 100644
--- a/pkg/Microsoft.Private.PackageBaseline/packageIndex.json
+++ b/pkg/Microsoft.Private.PackageBaseline/packageIndex.json
@@ -1031,7 +1031,7 @@
       "AssemblyVersionInPackageVersion": {
         "4.0.0.0": "4.0.0",
         "4.0.1.0": "4.0.1",
-        "4.0.2.0": "4.3.0"
+        "4.1.0.0": "4.3.0"
       }
     },
     "System.Diagnostics.TraceSource": {
diff --git a/src/System.Diagnostics.Tools/dir.props b/src/System.Diagnostics.Tools/dir.props
index 3a45f88c159a..0769c12aaa28 100644
--- a/src/System.Diagnostics.Tools/dir.props
+++ b/src/System.Diagnostics.Tools/dir.props
@@ -1,7 +1,7 @@
 <Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="..\dir.props" />
   <PropertyGroup>
-    <AssemblyVersion>4.0.2.0</AssemblyVersion>
+    <AssemblyVersion>4.1.0.0</AssemblyVersion>
   </PropertyGroup>
 </Project>
 
diff --git a/src/System.Diagnostics.Tools/pkg/System.Diagnostics.Tools.pkgproj b/src/System.Diagnostics.Tools/pkg/System.Diagnostics.Tools.pkgproj
index afeb38aca7f2..6a501adb366a 100644
--- a/src/System.Diagnostics.Tools/pkg/System.Diagnostics.Tools.pkgproj
+++ b/src/System.Diagnostics.Tools/pkg/System.Diagnostics.Tools.pkgproj
@@ -3,10 +3,13 @@
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
   <ItemGroup>
     <ProjectReference Include="..\ref\System.Diagnostics.Tools.csproj">
-      <SupportedFramework>net45;netcore45;netcoreapp1.0;wp8;wpa81;$(AllXamarinFrameworks)</SupportedFramework>
+      <SupportedFramework>net463;netcoreapp1.1;$(AllXamarinFrameworks)</SupportedFramework>
     </ProjectReference>
     <ProjectReference Include="any\System.Diagnostics.Tools.pkgproj" />
     <ProjectReference Include="aot\System.Diagnostics.Tools.pkgproj" />
+    <ProjectReference Include="..\src\System.Diagnostics.Tools.csproj">
+      <TargetGroup>net463</TargetGroup>
+    </ProjectReference>
     <InboxOnTargetFramework Include="MonoAndroid10" />
     <InboxOnTargetFramework Include="MonoTouch10" />
     <InboxOnTargetFramework Include="net45">
diff --git a/src/System.Diagnostics.Tools/pkg/aot/System.Diagnostics.Tools.pkgproj b/src/System.Diagnostics.Tools/pkg/aot/System.Diagnostics.Tools.pkgproj
index 0b8c70b588cd..d9827ceb9202 100644
--- a/src/System.Diagnostics.Tools/pkg/aot/System.Diagnostics.Tools.pkgproj
+++ b/src/System.Diagnostics.Tools/pkg/aot/System.Diagnostics.Tools.pkgproj
@@ -7,11 +7,5 @@
     <PreventImplementationReference>true</PreventImplementationReference>
   </PropertyGroup>
 
-  <ItemGroup>
-    <ProjectReference Include="..\..\src\System.Diagnostics.Tools.csproj">
-      <TargetGroup>netcore50aot</TargetGroup>
-    </ProjectReference>
-  </ItemGroup>
-
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
 </Project>
\ No newline at end of file
diff --git a/src/System.Diagnostics.Tools/ref/System.Diagnostics.Tools.cs b/src/System.Diagnostics.Tools/ref/System.Diagnostics.Tools.cs
index 64afbaf64b16..c0c9376d4254 100644
--- a/src/System.Diagnostics.Tools/ref/System.Diagnostics.Tools.cs
+++ b/src/System.Diagnostics.Tools/ref/System.Diagnostics.Tools.cs
@@ -18,6 +18,10 @@ public GeneratedCodeAttribute(string tool, string version) { }
 }
 namespace System.Diagnostics.CodeAnalysis
 {
+    [System.AttributeUsageAttribute((System.AttributeTargets)748, Inherited=false, AllowMultiple=false)]
+    public sealed partial class ExcludeFromCodeCoverageAttribute : System.Attribute {
+        public ExcludeFromCodeCoverageAttribute() { }
+    }    
     [System.AttributeUsageAttribute((System.AttributeTargets)(32767), Inherited = false, AllowMultiple = true)]
     [System.Diagnostics.ConditionalAttribute("CODE_ANALYSIS")]
     public sealed partial class SuppressMessageAttribute : System.Attribute
diff --git a/src/System.Diagnostics.Tools/ref/System.Diagnostics.Tools.csproj b/src/System.Diagnostics.Tools/ref/System.Diagnostics.Tools.csproj
index d2156f5f9525..4739c92930b1 100644
--- a/src/System.Diagnostics.Tools/ref/System.Diagnostics.Tools.csproj
+++ b/src/System.Diagnostics.Tools/ref/System.Diagnostics.Tools.csproj
@@ -2,9 +2,8 @@
 <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
   <PropertyGroup>
-    <AssemblyVersion>4.0.0.0</AssemblyVersion>
     <OutputType>Library</OutputType>
-    <NuGetTargetMoniker>.NETStandard,Version=v1.0</NuGetTargetMoniker>
+    <NuGetTargetMoniker>.NETStandard,Version=v1.7</NuGetTargetMoniker>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="System.Diagnostics.Tools.cs" />
diff --git a/src/System.Diagnostics.Tools/ref/project.json b/src/System.Diagnostics.Tools/ref/project.json
index cd1d800ec722..f4f769032164 100644
--- a/src/System.Diagnostics.Tools/ref/project.json
+++ b/src/System.Diagnostics.Tools/ref/project.json
@@ -1,12 +1,8 @@
 {
   "dependencies": {
-    "System.Runtime": "4.0.0"
+    "System.Runtime": "4.1.0"
   },
   "frameworks": {
-    "netstandard1.0": {
-      "imports": [
-        "dotnet5.1"
-      ]
-    }
+    "netstandard1.7": {}
   }
 }
diff --git a/src/System.Diagnostics.Tools/src/System.Diagnostics.Tools.builds b/src/System.Diagnostics.Tools/src/System.Diagnostics.Tools.builds
index beb14b718573..5bb1c0d7e3b9 100644
--- a/src/System.Diagnostics.Tools/src/System.Diagnostics.Tools.builds
+++ b/src/System.Diagnostics.Tools/src/System.Diagnostics.Tools.builds
@@ -3,12 +3,8 @@
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
   <ItemGroup>
     <Project Include="System.Diagnostics.Tools.csproj" />
-    <!-- Net46 facade is currently inbox for 4.0
     <Project Include="System.Diagnostics.Tools.csproj">
-      <TargetGroup>net46</TargetGroup>
-    </Project> -->
-    <Project Include="System.Diagnostics.Tools.csproj">
-      <TargetGroup>netcore50aot</TargetGroup>
+      <TargetGroup>net463</TargetGroup>
     </Project>
   </ItemGroup>
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.traversal.targets))\dir.traversal.targets" />
diff --git a/src/System.Diagnostics.Tools/src/System.Diagnostics.Tools.csproj b/src/System.Diagnostics.Tools/src/System.Diagnostics.Tools.csproj
index 64af9f6ea358..e893b6ae375a 100644
--- a/src/System.Diagnostics.Tools/src/System.Diagnostics.Tools.csproj
+++ b/src/System.Diagnostics.Tools/src/System.Diagnostics.Tools.csproj
@@ -5,27 +5,25 @@
     <ProjectGuid>{0B68298B-4672-4CA0-AD25-2F9ABEA1FF95}</ProjectGuid>
     <AssemblyName>System.Diagnostics.Tools</AssemblyName>
     <IsPartialFacadeAssembly>true</IsPartialFacadeAssembly>
-    <NuGetTargetMoniker Condition="'$(TargetGroup)' == ''">.NETStandard,Version=v1.3</NuGetTargetMoniker>
+    <NuGetTargetMoniker Condition="'$(TargetGroup)' == ''">.NETStandard,Version=v1.7</NuGetTargetMoniker>
   </PropertyGroup>
   <!-- Help VS understand available configurations -->
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|AnyCPU'" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|AnyCPU'" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'net46_Debug|AnyCPU'" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'net46_Release|AnyCPU'" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcore50aot_Debug|AnyCPU'" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcore50aot_Release|AnyCPU'" />
-  <ItemGroup Condition="'$(TargetGroup)' == '' Or '$(TargetGroup)' == 'net46'">
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'net463_Debug|AnyCPU'" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'net463_Release|AnyCPU'" />
+  <ItemGroup Condition="'$(TargetGroup)' == '' Or '$(TargetGroup)' == 'net463'">
     <TargetingPackReference Include="mscorlib" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetGroup)' == 'net46'">
+  <ItemGroup Condition="'$(TargetGroup)' == 'net463'">
     <TargetingPackReference Include="System" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetGroup)' == 'netcore50aot'">
-    <TargetingPackReference Include="System.Private.CoreLib" />
-  </ItemGroup>
-  <ItemGroup Condition="'$(TargetGroup)' != 'net46'">
+  <ItemGroup Condition="'$(TargetGroup)' != 'net463'">
     <Compile Include="System\CodeDom\Compiler\GeneratedCodeAttribute.cs" />
   </ItemGroup>
+  <ItemGroup>
+    <Compile Include="System\Diagnostics\CodeAnalysis\ExcludeFromCodeCoverageAttribute.cs" />    
+  </ItemGroup>
   <ItemGroup>
     <None Include="project.json" />
   </ItemGroup>
diff --git a/src/System.Diagnostics.Tools/src/System/Diagnostics/CodeAnalysis/ExcludeFromCodeCoverageAttribute.cs b/src/System.Diagnostics.Tools/src/System/Diagnostics/CodeAnalysis/ExcludeFromCodeCoverageAttribute.cs
new file mode 100644
index 000000000000..ebbda66b0cbf
--- /dev/null
+++ b/src/System.Diagnostics.Tools/src/System/Diagnostics/CodeAnalysis/ExcludeFromCodeCoverageAttribute.cs
@@ -0,0 +1,13 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace System.Diagnostics.CodeAnalysis
+{
+    [AttributeUsageAttribute(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Constructor | AttributeTargets.Method | AttributeTargets.Property | AttributeTargets.Event, Inherited = false, AllowMultiple = false)]
+    public sealed class ExcludeFromCodeCoverageAttribute: Attribute
+    {
+        public ExcludeFromCodeCoverageAttribute()
+        { }
+    }
+}
diff --git a/src/System.Diagnostics.Tools/src/project.json b/src/System.Diagnostics.Tools/src/project.json
index 451853d445b5..a065b8ab082f 100644
--- a/src/System.Diagnostics.Tools/src/project.json
+++ b/src/System.Diagnostics.Tools/src/project.json
@@ -1,21 +1,13 @@
 {
   "frameworks": {
-    "netstandard1.3": {
+    "netstandard1.7": {
       "dependencies": {
         "Microsoft.TargetingPack.Private.CoreCLR": "1.2.0-beta-24530-04"
-      },
-      "imports": [
-        "dotnet5.4"
-      ]
-    },
-    "net46": {
-      "dependencies": {
-        "Microsoft.TargetingPack.NETFramework.v4.6": "1.0.1"
       }
     },
-    "netcore50": {
+    "net463": {
       "dependencies": {
-        "Microsoft.TargetingPack.Private.NETNative": "1.1.0-beta-24530-00"
+        "Microsoft.TargetingPack.NETFramework.v4.6": "1.0.1"
       }
     }
   }
diff --git a/src/System.Diagnostics.Tools/tests/System.Diagnostics.Tools.Tests.builds b/src/System.Diagnostics.Tools/tests/System.Diagnostics.Tools.Tests.builds
index cea15a4a0bf6..3d50833f9178 100644
--- a/src/System.Diagnostics.Tools/tests/System.Diagnostics.Tools.Tests.builds
+++ b/src/System.Diagnostics.Tools/tests/System.Diagnostics.Tools.Tests.builds
@@ -2,11 +2,15 @@
 <Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
   <ItemGroup>
-    <Project Include="System.Diagnostics.Tools.Tests.csproj"/>
+  <Project Include="System.Diagnostics.Tools.Tests.csproj"/>
     <Project Include="System.Diagnostics.Tools.Tests.csproj">
       <TestTFMs>netcore50;net46</TestTFMs>
       <OSGroup>Windows_NT</OSGroup>
     </Project>
+    <Project Include="System.Diagnostics.Tools.Tests.csproj">
+      <TargetGroup>netstandard1.7</TargetGroup>
+      <TestTFMs>netcoreapp1.1</TestTFMs>
+    </Project>
   </ItemGroup>
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.traversal.targets))\dir.traversal.targets" />
 </Project>
diff --git a/src/System.Diagnostics.Tools/tests/System.Diagnostics.Tools.Tests.csproj b/src/System.Diagnostics.Tools/tests/System.Diagnostics.Tools.Tests.csproj
index 7ca4c24c329c..a63b16af9654 100644
--- a/src/System.Diagnostics.Tools/tests/System.Diagnostics.Tools.Tests.csproj
+++ b/src/System.Diagnostics.Tools/tests/System.Diagnostics.Tools.Tests.csproj
@@ -8,7 +8,7 @@
     <OutputType>Library</OutputType>
     <RootNamespace>System</RootNamespace>
     <AssemblyName>System.Diagnostics.Tools.Tests</AssemblyName>
-    <NugetTargetMoniker>.NETStandard,Version=v1.3</NugetTargetMoniker>
+    <NugetTargetMoniker Condition="'$(TargetGroup)' == ''">.NETStandard,Version=v1.3</NugetTargetMoniker>
   </PropertyGroup>
   <!-- Default configurations to help VS understand the configurations -->
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|AnyCPU'" />
@@ -17,13 +17,12 @@
     <Compile Include="System\CodeDom\Compiler\GeneratedCodeAttributeTests.cs" />
     <Compile Include="System\Diagnostics\CodeAnalysis\SuppressMessageAttributeTests.cs" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetGroup)'=='netstandard1.7'">
+    <Compile Include="System\Diagnostics\CodeAnalysis\ExcludeFromCodeCoverageAttributeTests.cs" />    
+  </ItemGroup>
   <ItemGroup>
     <!-- Compile tests against the contract, but copy our local-built implementation for testing -->
-    <ProjectReference Include="..\pkg\System.Diagnostics.Tools.pkgproj">
-      <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
-      <OutputItemType>Content</OutputItemType>
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Targets>Build;DebugSymbolsProjectOutputGroup</Targets>
+   <ProjectReference Include="..\pkg\System.Diagnostics.Tools.pkgproj">
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/System.Diagnostics.Tools/tests/System/Diagnostics/CodeAnalysis/ExcludeFromCodeCoverageAttributeTests.cs b/src/System.Diagnostics.Tools/tests/System/Diagnostics/CodeAnalysis/ExcludeFromCodeCoverageAttributeTests.cs
new file mode 100644
index 000000000000..efe08ce6f45f
--- /dev/null
+++ b/src/System.Diagnostics.Tools/tests/System/Diagnostics/CodeAnalysis/ExcludeFromCodeCoverageAttributeTests.cs
@@ -0,0 +1,18 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Diagnostics.CodeAnalysis;
+using Xunit;
+
+namespace System.Diagnostics.CodeAnalysis.Tests
+{
+    public class ExcludeFromCodeCoverageAttributeTests
+    {
+        [Fact]
+        public void ExcludeFromCodeCoverageAttribute_Instantiate()
+        {
+            new ExcludeFromCodeCoverageAttribute();
+        }
+    }
+}
diff --git a/src/System.Diagnostics.Tools/tests/project.json b/src/System.Diagnostics.Tools/tests/project.json
index 3f362bab302a..56bd48f8e5d7 100644
--- a/src/System.Diagnostics.Tools/tests/project.json
+++ b/src/System.Diagnostics.Tools/tests/project.json
@@ -13,7 +13,8 @@
     "Microsoft.DotNet.BuildTools.TestSuite": "1.0.0-prerelease-00807-03"
   },
   "frameworks": {
-    "netstandard1.3": {}
+    "netstandard1.3": {},
+    "netstandard1.7": {}
   },
   "supports": {
     "coreFx.Test.netcore50": {},