委托的例子

 using System;
using System.Collections.Generic;
using System.Text;

namespace EventEventHandlerTest
{
    public delegate void MyDelegate(string str);

    public class Program
    {
        public  static void Main(string[] args)
        {
            MyDelegate d1 = new MyDelegate(C.M1);
            d1("D1");
            MyDelegate d2 = new MyDelegate(C.M2);
            d2("D2");
            MyDelegate d3 = new MyDelegate(new C().M3);
            d3("D3");
            MyDelegate d4 = new MyDelegate(d3);
            d4("D4");
            Console.WriteLine("---------------");
            MyDelegate d5 = d1 + d2;
            d5("D5");
            Console.WriteLine("---------------");
            d5 += d3;
            Console.WriteLine("---------------");
            d5("D55");
            Console.WriteLine("---------------");
            MyDelegate d6 = d5 - d3;
            d6("D6");
            Console.WriteLine("---------------");
            d6 -= d6;
            d6("D6");
            Console.WriteLine("---------------");
            Console.WriteLine("---------------");
            Console.ReadLine();
        }
    }

     public class C
     {
         public static void M1(string str)
         {
             Console.WriteLine("From:C.M1:    {0}", str);
         }

         public static void M2(string str)
         {
             Console.WriteLine("From:C.M2:    {0}", str);
         }

         public void M3(string str)
         {
             Console.WriteLine("From:C.M3:    {0}", str);
         }
     }

     public class C1
     {
         public static void P1(string str)
         {
             Console.WriteLine("From:C1.P1:    {0}", str);
         }
     }

     public class C2
     {
         public void P1(string str)
         {
             Console.WriteLine("From:C2.P1:    {0}", str);
         }
     }   
}