update

packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/src/Providers/TypeProvider.cs

@@ -35,7 +35,7 @@ protected TypeProvider() : this(null)
         }
 
         private protected virtual TypeProvider? GetCustomCodeView()
-            => CodeModelPlugin.Instance.SourceInputModel.FindForType(BuildNamespace(), Name);
+            => CodeModelPlugin.Instance.SourceInputModel.FindForType(BuildNamespace(), BuildName());
 
         public TypeProvider? CustomCodeView => _customCodeView.Value;