diff --git a/src/libraries/System.Text.Json/ref/System.Text.Json.cs b/src/libraries/System.Text.Json/ref/System.Text.Json.cs
index 4184827a8025b8..7735e6abd5e422 100644
--- a/src/libraries/System.Text.Json/ref/System.Text.Json.cs
+++ b/src/libraries/System.Text.Json/ref/System.Text.Json.cs
@@ -184,49 +184,33 @@ public partial struct JsonReaderState
     }
     public static partial class JsonSerializer
     {
-#if NETCOREAPP && !NETCOREAPP3_0
-        private const System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes MembersAccessedOnRead = System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicConstructors | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties;
-        private const System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes MembersAccessedOnWrite = System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties;
-        public static object? Deserialize(System.ReadOnlySpan<byte> utf8Json, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnRead)] System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static object? Deserialize(string json, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnRead)] System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static object? Deserialize(ref System.Text.Json.Utf8JsonReader reader, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnRead)] System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static System.Threading.Tasks.ValueTask<object?> DeserializeAsync(System.IO.Stream utf8Json, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnRead)] System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
-        public static System.Threading.Tasks.ValueTask<TValue?> DeserializeAsync<[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnRead)] TValue>(System.IO.Stream utf8Json, System.Text.Json.JsonSerializerOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
-        public static TValue? Deserialize<[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnRead)] TValue>(System.ReadOnlySpan<byte> utf8Json, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static TValue? Deserialize<[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnRead)] TValue>(string json, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static TValue? Deserialize<[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnRead)] TValue>(ref System.Text.Json.Utf8JsonReader reader, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static string Serialize(object? value, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnWrite)] System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static void Serialize(System.Text.Json.Utf8JsonWriter writer, object? value, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnWrite)] System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null) { }
-        public static System.Threading.Tasks.Task SerializeAsync(System.IO.Stream utf8Json, object? value, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnWrite)] System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
-        public static System.Threading.Tasks.Task SerializeAsync<[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnWrite)] TValue>(System.IO.Stream utf8Json, TValue value, System.Text.Json.JsonSerializerOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
-        public static byte[] SerializeToUtf8Bytes(object? value, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnWrite)] System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static byte[] SerializeToUtf8Bytes<[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnWrite)] TValue>(TValue value, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static void Serialize<[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnWrite)] TValue>(System.Text.Json.Utf8JsonWriter writer, TValue value, System.Text.Json.JsonSerializerOptions? options = null) { }
-        public static string Serialize<[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(MembersAccessedOnWrite)] TValue>(TValue value, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-#else
-        public static object? Deserialize(System.ReadOnlySpan<byte> utf8Json, System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static object? Deserialize(string json, System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static object? Deserialize(ref System.Text.Json.Utf8JsonReader reader, System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static System.Threading.Tasks.ValueTask<object?> DeserializeAsync(System.IO.Stream utf8Json, System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+        public static object? Deserialize(System.ReadOnlySpan<byte> utf8Json, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicConstructors | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicFields | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)] System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
+        public static object? Deserialize(string json, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicConstructors | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicFields | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)] System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
+        public static object? Deserialize(ref System.Text.Json.Utf8JsonReader reader, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicConstructors | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicFields | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)] System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
+        public static System.Threading.Tasks.ValueTask<object?> DeserializeAsync(System.IO.Stream utf8Json, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicConstructors | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicFields | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)] System.Type returnType, System.Text.Json.JsonSerializerOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public static System.Threading.Tasks.ValueTask<TValue?> DeserializeAsync<TValue>(System.IO.Stream utf8Json, System.Text.Json.JsonSerializerOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public static TValue? Deserialize<TValue>(System.ReadOnlySpan<byte> utf8Json, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
         public static TValue? Deserialize<TValue>(string json, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
         public static TValue? Deserialize<TValue>(ref System.Text.Json.Utf8JsonReader reader, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static string Serialize(object? value, System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-        public static void Serialize(System.Text.Json.Utf8JsonWriter writer, object? value, System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null) { }
-        public static System.Threading.Tasks.Task SerializeAsync(System.IO.Stream utf8Json, object? value, System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+        public static string Serialize(object? value, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicFields | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)] System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
+        public static void Serialize(System.Text.Json.Utf8JsonWriter writer, object? value, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicFields | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)] System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null) { }
+        public static System.Threading.Tasks.Task SerializeAsync(System.IO.Stream utf8Json, object? value, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicFields | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)] System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public static System.Threading.Tasks.Task SerializeAsync<TValue>(System.IO.Stream utf8Json, TValue value, System.Text.Json.JsonSerializerOptions? options = null, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
-        public static byte[] SerializeToUtf8Bytes(object? value, System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
+        public static byte[] SerializeToUtf8Bytes(object? value, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicFields | System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicProperties)] System.Type inputType, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
         public static byte[] SerializeToUtf8Bytes<TValue>(TValue value, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
         public static void Serialize<TValue>(System.Text.Json.Utf8JsonWriter writer, TValue value, System.Text.Json.JsonSerializerOptions? options = null) { }
         public static string Serialize<TValue>(TValue value, System.Text.Json.JsonSerializerOptions? options = null) { throw null; }
-#endif
+    }
+    public enum JsonSerializerDefaults
+    {
+        General = 0,
+        Web = 1,
     }
     public sealed partial class JsonSerializerOptions
     {
         public JsonSerializerOptions() { }
-        public JsonSerializerOptions(System.Text.Json.JsonSerializerOptions options) { }
         public JsonSerializerOptions(System.Text.Json.JsonSerializerDefaults defaults) { }
+        public JsonSerializerOptions(System.Text.Json.JsonSerializerOptions options) { }
         public bool AllowTrailingCommas { get { throw null; } set { } }
         public System.Collections.Generic.IList<System.Text.Json.Serialization.JsonConverter> Converters { get { throw null; } }
         public int DefaultBufferSize { get { throw null; } set { } }
@@ -234,8 +218,8 @@ public JsonSerializerOptions(System.Text.Json.JsonSerializerDefaults defaults) {
         public System.Text.Json.JsonNamingPolicy? DictionaryKeyPolicy { get { throw null; } set { } }
         public System.Text.Encodings.Web.JavaScriptEncoder? Encoder { get { throw null; } set { } }
         public bool IgnoreNullValues { get { throw null; } set { } }
-        public bool IgnoreReadOnlyProperties { get { throw null; } set { } }
         public bool IgnoreReadOnlyFields { get { throw null; } set { } }
+        public bool IgnoreReadOnlyProperties { get { throw null; } set { } }
         public bool IncludeFields { get { throw null; } set { } }
         public int MaxDepth { get { throw null; } set { } }
         public System.Text.Json.Serialization.JsonNumberHandling NumberHandling { get { throw null; } set { } }
@@ -246,11 +230,6 @@ public JsonSerializerOptions(System.Text.Json.JsonSerializerDefaults defaults) {
         public bool WriteIndented { get { throw null; } set { } }
         public System.Text.Json.Serialization.JsonConverter GetConverter(System.Type typeToConvert) { throw null; }
     }
-    public enum JsonSerializerDefaults
-    {
-        General = 0,
-        Web = 1,
-    }
     public enum JsonTokenType : byte
     {
         None = (byte)0,
@@ -484,31 +463,21 @@ public void WriteStringValue(System.Text.Json.JsonEncodedText value) { }
 }
 namespace System.Text.Json.Serialization
 {
-    public enum JsonIgnoreCondition
-    {
-        Never = 0,
-        Always = 1,
-        WhenWritingDefault = 2,
-        WhenWritingNull = 3,
-    }
-    [System.FlagsAttribute]
-    public enum JsonNumberHandling
-    {
-        Strict = 0,
-        AllowReadingFromString = 1,
-        WriteAsString = 2,
-        AllowNamedFloatingPointLiterals = 4,
-    }
     public abstract partial class JsonAttribute : System.Attribute
     {
         protected JsonAttribute() { }
     }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Constructor, AllowMultiple=false)]
+    public sealed partial class JsonConstructorAttribute : System.Text.Json.Serialization.JsonAttribute
+    {
+        public JsonConstructorAttribute() { }
+    }
     public abstract partial class JsonConverter
     {
         internal JsonConverter() { }
         public abstract bool CanConvert(System.Type typeToConvert);
     }
-    [System.AttributeUsageAttribute(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Enum | System.AttributeTargets.Property | System.AttributeTargets.Field, AllowMultiple=false)]
+    [System.AttributeUsageAttribute(System.AttributeTargets.Class | System.AttributeTargets.Enum | System.AttributeTargets.Field | System.AttributeTargets.Property | System.AttributeTargets.Struct, AllowMultiple=false)]
     public partial class JsonConverterAttribute : System.Text.Json.Serialization.JsonAttribute
     {
         protected JsonConverterAttribute() { }
@@ -525,39 +494,49 @@ protected JsonConverterFactory() { }
     public abstract partial class JsonConverter<T> : System.Text.Json.Serialization.JsonConverter
     {
         protected internal JsonConverter() { }
-        public override bool CanConvert(System.Type typeToConvert) { throw null; }
         public virtual bool HandleNull { get { throw null; } }
+        public override bool CanConvert(System.Type typeToConvert) { throw null; }
         public abstract T? Read(ref System.Text.Json.Utf8JsonReader reader, System.Type typeToConvert, System.Text.Json.JsonSerializerOptions options);
         public abstract void Write(System.Text.Json.Utf8JsonWriter writer, T value, System.Text.Json.JsonSerializerOptions options);
     }
-    [System.AttributeUsageAttribute(System.AttributeTargets.Class | System.AttributeTargets.Struct | System.AttributeTargets.Property | System.AttributeTargets.Field, AllowMultiple = false)]
-    public sealed partial class JsonNumberHandlingAttribute : System.Text.Json.Serialization.JsonAttribute
-    {
-        public JsonNumberHandlingAttribute(System.Text.Json.Serialization.JsonNumberHandling handling) { }
-        public System.Text.Json.Serialization.JsonNumberHandling Handling { get { throw null; } }
-    }
-    [System.AttributeUsageAttribute(System.AttributeTargets.Constructor, AllowMultiple = false)]
-    public sealed partial class JsonConstructorAttribute : System.Text.Json.Serialization.JsonAttribute
-    {
-        public JsonConstructorAttribute() { }
-    }
-    [System.AttributeUsageAttribute(System.AttributeTargets.Property | System.AttributeTargets.Field, AllowMultiple=false)]
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Property, AllowMultiple=false)]
     public sealed partial class JsonExtensionDataAttribute : System.Text.Json.Serialization.JsonAttribute
     {
         public JsonExtensionDataAttribute() { }
     }
-    [System.AttributeUsageAttribute(System.AttributeTargets.Property | System.AttributeTargets.Field, AllowMultiple=false)]
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Property, AllowMultiple=false)]
     public sealed partial class JsonIgnoreAttribute : System.Text.Json.Serialization.JsonAttribute
     {
         public JsonIgnoreAttribute() { }
         public System.Text.Json.Serialization.JsonIgnoreCondition Condition { get { throw null; } set { } }
     }
-    [System.AttributeUsageAttribute(System.AttributeTargets.Property | System.AttributeTargets.Field, AllowMultiple = false)]
+    public enum JsonIgnoreCondition
+    {
+        Never = 0,
+        Always = 1,
+        WhenWritingDefault = 2,
+        WhenWritingNull = 3,
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Property, AllowMultiple=false)]
     public sealed partial class JsonIncludeAttribute : System.Text.Json.Serialization.JsonAttribute
     {
         public JsonIncludeAttribute() { }
     }
-    [System.AttributeUsageAttribute(System.AttributeTargets.Property | System.AttributeTargets.Field, AllowMultiple=false)]
+    [System.FlagsAttribute]
+    public enum JsonNumberHandling
+    {
+        Strict = 0,
+        AllowReadingFromString = 1,
+        WriteAsString = 2,
+        AllowNamedFloatingPointLiterals = 4,
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Class | System.AttributeTargets.Field | System.AttributeTargets.Property | System.AttributeTargets.Struct, AllowMultiple=false)]
+    public sealed partial class JsonNumberHandlingAttribute : System.Text.Json.Serialization.JsonAttribute
+    {
+        public JsonNumberHandlingAttribute(System.Text.Json.Serialization.JsonNumberHandling handling) { }
+        public System.Text.Json.Serialization.JsonNumberHandling Handling { get { throw null; } }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Property, AllowMultiple=false)]
     public sealed partial class JsonPropertyNameAttribute : System.Text.Json.Serialization.JsonAttribute
     {
         public JsonPropertyNameAttribute(string name) { }