diff --git a/fundamentals/aot/diagnostics/Rdg13/Program.cs b/fundamentals/aot/diagnostics/Rdg13/Program.cs
index 3c17145..0a2f719 100644
--- a/fundamentals/aot/diagnostics/Rdg13/Program.cs
+++ b/fundamentals/aot/diagnostics/Rdg13/Program.cs
@@ -1,4 +1,4 @@
-#define RDG13F //   RDG13 RDG13F
+#define RDG13 //   RDG13 RDG13F
 #if NEVER
 #elif RDG13
 // <snippet_1>
@@ -7,8 +7,6 @@ using Microsoft.AspNetCore.Mvc;
 var builder = WebApplication.CreateBuilder(args);
 
 builder.Services.AddKeyedSingleton<IService, FizzService>("fizz");
-builder.Services.AddKeyedSingleton<IService, BuzzService>("buzz");
-builder.Services.AddSingleton<IService, FizzBuzzService>();
 var app = builder.Build();
 
 app.MapGet("/fizz", ([FromKeyedServices("fizz")][FromServices] IService service) =>
@@ -16,18 +14,8 @@ app.MapGet("/fizz", ([FromKeyedServices("fizz")][FromServices] IService service)
     return Results.Ok(service.Echo());
 });
 
-app.MapGet("/buzz", ([FromKeyedServices("buzz")] IService service) =>
-{
-    return Results.Ok(service.Echo());
-});
-
-app.MapGet("/fizzbuzz", ([FromServices] IService service) =>
-{
-    return Results.Ok(service.Echo());
-});
-
 app.Run();
-
+// </snippet_1>
 public interface IService
 {
     string Echo();
@@ -40,23 +28,6 @@ public class FizzService : IService
         return "Fizz";
     }
 }
-
-public class BuzzService : IService
-{
-    public string Echo()
-    {
-        return "Buzz";
-    }
-}
-
-public class FizzBuzzService : IService
-{
-    public string Echo()
-    {
-        return "FizzBuzz";
-    }
-}
-// </snippet_1>
 #elif RDG13F
 // <snippet_1f>
 using Microsoft.AspNetCore.Mvc;