diff --git a/aspnetcore/fundamentals/aot/request-delegate-generator/diagnostics/rdg012.md b/aspnetcore/fundamentals/aot/request-delegate-generator/diagnostics/rdg012.md
index c67e1fbdd8..95bb9b334d 100644
--- a/aspnetcore/fundamentals/aot/request-delegate-generator/diagnostics/rdg012.md
+++ b/aspnetcore/fundamentals/aot/request-delegate-generator/diagnostics/rdg012.md
@@ -20,32 +20,18 @@ This diagnostic is emitted by the Request Delegate Generator when an endpoint co
 
 ### Rule description
 
-The Request Delegate Generator only supports 
+Endpoints that use an inaccessible type (`private` or `protected`) are not supported. 
+The endpoints within `MapEndpoints` produce this diagnostic because of the `Todo` type has the `private` accessibility modifiers.
 
-```csharp
-var app = WebApplication.Create();
+:::code language="csharp" source="~/../AspNetCore.Docs.Samples/fundamentals/aot/diagnostics/Rdg12/Program.cs" id="snippet_1" highlight="9-20, 22":::
 
-app.MapPost("/vl/todos", (Todo todo)
-	=> Results.Created(todo));
-
-app.Run();
-
-private record Todo(int Id, string Task);
-```
 
 ## How to fix violations
 
 When applicable, set the target parameter type with a friendly accessibility.
-```csharp
-var app = WebApplication.Create();
 
-app.MapPost("/vl/todos", (Todo todo)
-	=> Results.Created(todo));
+:::code language="csharp" source="~/../AspNetCore.Docs.Samples/fundamentals/aot/diagnostics/Rdg12/Program.cs" id="snippet_1f" highlight="9-20, 22":::
 
-app.Run();
-
-public record Todo(int Id, string Task);
-```
 
 ## When to suppress warnings