adding fields that are from non-user-code as private

src/mono/wasm/debugger/BrowserDebugProxy/DebugStore.cs

@@ -701,6 +701,7 @@ internal sealed class TypeInfo
         internal int Token { get; }
         internal string Namespace { get; }
         internal bool IsCompilerGenerated { get; }
+        internal bool NonUserCode { get; }
         public string FullName { get; }
         public List<MethodInfo> Methods { get; } = new();
         public Dictionary<string, DebuggerBrowsableState?> DebuggerBrowsableFields = new();
@@ -769,8 +770,15 @@ internal TypeInfo(AssemblyInfo assembly, TypeDefinitionHandle typeHandle, TypeDe
                     continue;
                 var container = metadataReader.GetMemberReference((MemberReferenceHandle)ctorHandle).Parent;
                 var attributeName = assembly.EnCGetString(metadataReader.GetTypeReference((TypeReferenceHandle)container).Name);
-                if (attributeName == nameof(CompilerGeneratedAttribute))
-                    IsCompilerGenerated = true;
+                switch (attributeName)
+                {
+                    case nameof(CompilerGeneratedAttribute):
+                        IsCompilerGenerated = true;
+                        break;
+                    case nameof(DebuggerNonUserCodeAttribute):
+                        NonUserCode = true;
+                        break;
+                }
             }
 
             void AppendToBrowsable(Dictionary<string, DebuggerBrowsableState?> dict, CustomAttributeHandleCollection customAttrs, string fieldName)

src/mono/wasm/debugger/BrowserDebugProxy/MemberObjectsExplorer.cs

@@ -71,6 +71,10 @@ private static async Task<JObject> ReadFieldValue(
                 FieldAttributes.Public => "result",
                 _ => "internal"
             };
+
+            if (!isOwn && typeInfo.Info.NonUserCode && getObjectOptions.HasFlag(GetObjectCommandOptions.JustMyCode))
+                fieldValue["__section"] = "private";
+
             if (field.IsBackingField)
             {
                 fieldValue["__isBackingField"] = true;

src/mono/wasm/debugger/BrowserDebugProxy/MonoProxy.cs

@@ -745,6 +745,8 @@ internal async Task<ValueOrError<GetMembersResult>> RuntimeGetObjectMembers(Sess
                 if (args["forDebuggerDisplayAttribute"]?.Value<bool>() == true)
                     getObjectOptions |= GetObjectCommandOptions.ForDebuggerDisplayAttribute;
             }
+            if (JustMyCode)
+                getObjectOptions |= GetObjectCommandOptions.JustMyCode;
             try
             {
                 switch (objectId.Scheme)

src/mono/wasm/debugger/BrowserDebugProxy/MonoSDBHelper.cs

@@ -59,7 +59,8 @@ internal enum GetObjectCommandOptions
         OwnProperties = 4,
         ForDebuggerProxyAttribute = 8,
         ForDebuggerDisplayAttribute = 16,
-        WithProperties = 32
+        WithProperties = 32,
+        JustMyCode = 64
     }
 
     internal enum CommandSet {