C# で廃止されたプロパティはどれですか?

using System;

public class Demo {
   [Obsolete("Old Method shouldn't be used! Use New Method instead", true)]

   static void OldMethod() {
      Console.WriteLine("This is the old method!");
   }

   static void NewMethod() {
      Console.WriteLine("This is the new method!");
   }

   public static void Main() {
      OldMethod();
   }
}

Compilation failed: 1 error(s), 0 warnings
error CS0619: `Demo.OldMethod()' is obsolete: `Old Method shouldn't be used! Use New Method instead'