Update MyClass.cs (#35612)

BillWagner · web-flow · commit 7e327ba2ea87 · 2023-06-07T14:13:16.000-05:00
See #35610 (comment)
diff --git a/docs/csharp/language-reference/compiler-messages/snippets/UsingDirectives/MyClass.cs b/docs/csharp/language-reference/compiler-messages/snippets/UsingDirectives/MyClass.cs
@@ -1,5 +1,5 @@
 ﻿// <UsingExample>
-using System;
+using System.Text.Json;
 namespace UsingDirective;
 public class MyClass
 {
