示例

// CS1911.cs
// compile with: /W:1
using System;

delegate void D();
delegate D RetD();

class B {
   protected virtual void M() {
      Console.WriteLine("B.M");
   }
}

class Der : B {
   protected override void M() {
      Console.WriteLine("D.M");
   }

   void Test() { base.M(); }
   D Test2() { return new D(base.M); }

   public D CallBaseM() {
      return delegate () { base.M(); };   // CS1911

      // try the following line instead
      // return delegate () { Test(); };
   }

   public RetD DelToBaseM() {
      return delegate () { return new D(base.M); };   // CS1911

      // try the following line instead
      // return delegate () { return Test2(); };
   }
}

class Program {
   public static void Main() {
      Der der = new Der();
      D d = der.CallBaseM();
      d();
      RetD rd = der.DelToBaseM();
      rd()();
   }
}