Fix DebuggerDisplay for serializer types

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Metadata/JsonPropertyInfo.cs

@@ -11,7 +11,7 @@ namespace System.Text.Json.Serialization.Metadata
     /// <summary>
     /// Provides JSON serialization-related metadata about a property or field.
     /// </summary>
-    [DebuggerDisplay("MemberInfo={MemberInfo}")]
+    [DebuggerDisplay("{DebuggerDisplay,nq}")]
     [EditorBrowsable(EditorBrowsableState.Never)]
     public abstract class JsonPropertyInfo
     {
@@ -519,5 +519,8 @@ internal JsonTypeInfo JsonTypeInfo
         /// Default value used for parameterized ctor invocation.
         /// </summary>
         internal abstract object? DefaultValue { get; }
+
+        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
+        private string DebuggerDisplay => $"MemberInfo={MemberInfo}";
     }
 }

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Metadata/JsonTypeInfo.cs

@@ -14,7 +14,7 @@ namespace System.Text.Json.Serialization.Metadata
     /// Provides JSON serialization-related metadata about a type.
     /// </summary>
     /// <remarks>This API is for use by the output of the System.Text.Json source generator and should not be called directly.</remarks>
-    [DebuggerDisplay("ConverterStrategy.{ConverterStrategy}, {Type.Name}")]
+    [DebuggerDisplay("{DebuggerDisplay,nq}")]
     [EditorBrowsable(EditorBrowsableState.Never)]
     public partial class JsonTypeInfo
     {
@@ -632,5 +632,8 @@ private static bool IsByRefLike(Type type)
 
             return numberHandlingAttribute?.Handling;
         }
+
+        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
+        private string DebuggerDisplay => $"ConverterStrategy.{PropertyInfoForTypeInfo.ConverterStrategy}, {Type.Name}";
     }
 }

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/ReadStack.cs

@@ -10,7 +10,7 @@
 
 namespace System.Text.Json
 {
-    [DebuggerDisplay("Path:{JsonPath()} Current: ConverterStrategy.{Current.JsonTypeInfo.PropertyInfoForTypeInfo.ConverterStrategy}, {Current.JsonTypeInfo.Type.Name}")]
+    [DebuggerDisplay("{DebuggerDisplay,nq}")]
     internal struct ReadStack
     {
         internal static readonly char[] SpecialCharacters = { '.', ' ', '\'', '/', '"', '[', ']', '(', ')', '\t', '\n', '\r', '\f', '\b', '\\', '\u0085', '\u2028', '\u2029' };
@@ -355,5 +355,8 @@ private void SetConstructorArgumentState()
                 }
             }
         }
+
+        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
+        private string DebuggerDisplay => $"Path:{JsonPath()} Current: ConverterStrategy.{Current.JsonTypeInfo?.PropertyInfoForTypeInfo.ConverterStrategy}, {Current.JsonTypeInfo?.Type.Name}";
     }
 }

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/ReadStackFrame.cs

@@ -8,7 +8,7 @@
 
 namespace System.Text.Json
 {
-    [DebuggerDisplay("ConverterStrategy.{JsonTypeInfo.PropertyInfoForTypeInfo.ConverterStrategy}, {JsonTypeInfo.Type.Name}")]
+    [DebuggerDisplay("{DebuggerDisplay,nq}")]
     internal struct ReadStackFrame
     {
         // Current property values.
@@ -89,5 +89,8 @@ public bool IsProcessingEnumerable()
         {
             return (JsonTypeInfo.PropertyInfoForTypeInfo.ConverterStrategy & ConverterStrategy.Enumerable) != 0;
         }
+
+        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
+        private string DebuggerDisplay => $"ConverterStrategy.{JsonTypeInfo?.PropertyInfoForTypeInfo.ConverterStrategy}, {JsonTypeInfo?.Type.Name}";
     }
 }

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/WriteStack.cs

@@ -12,7 +12,7 @@
 
 namespace System.Text.Json
 {
-    [DebuggerDisplay("Path:{PropertyPath()} Current: ConverterStrategy.{ConverterStrategy.JsonTypeInfo.PropertyInfoForTypeInfo.ConverterStrategy}, {Current.JsonTypeInfo.Type.Name}")]
+    [DebuggerDisplay("{DebuggerDisplay,nq}")]
     internal struct WriteStack
     {
         /// <summary>
@@ -375,5 +375,8 @@ static void AppendPropertyName(StringBuilder sb, string? propertyName)
                 }
             }
         }
+
+        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
+        private string DebuggerDisplay => $"Path:{PropertyPath()} Current: ConverterStrategy.{Current.JsonPropertyInfo?.ConverterBase.ConverterStrategy}, {Current.JsonTypeInfo?.Type.Name}";
     }
 }

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/WriteStackFrame.cs

@@ -8,7 +8,7 @@
 
 namespace System.Text.Json
 {
-    [DebuggerDisplay("ConverterStrategy.{JsonTypeInfo.PropertyInfoForTypeInfo.ConverterStrategy}, {JsonTypeInfo.Type.Name}")]
+    [DebuggerDisplay("{DebuggerDisplay,nq}")]
     internal struct WriteStackFrame
     {
         /// <summary>
@@ -120,5 +120,8 @@ public JsonConverter InitializeReEntry(Type type, JsonSerializerOptions options)
 
             return PolymorphicJsonPropertyInfo.ConverterBase;
         }
+
+        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
+        private string DebuggerDisplay => $"ConverterStrategy.{JsonTypeInfo?.PropertyInfoForTypeInfo.ConverterStrategy}, {JsonTypeInfo?.Type.Name}";
     }
 }