using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConsoleApplication2{    class Program    {        static void Add(int num1, int num2)   {       Console.Write(num1 + num2); Console.Write('\n');   }        static void Subs(int i, int j)        { Console.Write(i - j); Console.Write('\n'); }       delegate void  Calc(int i,int j);//定义一个代理类型Calc，它可以用于定义各种参数为两个整数的任意方法；故        static void Main(string[] args)        {            //Calc c1=new Calc(Add);            //Calc c2=new Calc(Subs);            //c1(3, 4);            //c2(3, 4);            Calc c = Add;            c += Subs;            c(8888, 7);            Console.ReadKey();        }    }}

 the second example:

using System;using System.Collections.Generic;using System.Text;namespace Delegate{    //定义委托，它定义了可以代表的方法的类型    public delegate void GreetingDelegate(string name);    class Program    {        public class GreetingManager        {            //在GreetingManager类的内部声明delegate1变量            public GreetingDelegate delegate1;            public void GreetPeople(string name)            {                if(delegate1!=null)                    this.delegate1(name);            }        }        private static void EnglishGreeting(string name)        {            Console.WriteLine("Morning, " + name);        }        private static void ChineseGreeting(string name)        {            Console.WriteLine("早上好, " + name);        }        private static void JapaneseGreeting(string name)        {            Console.WriteLine("おはよう, " + name);        }        //注意此方法，它接受一个GreetingDelegate类型的方法作为参数        static void Main(string[] args)        {            GreetingManager gm = new GreetingManager();            gm.delegate1 = EnglishGreeting;            gm.delegate1 += ChineseGreeting;            gm.delegate1 += JapaneseGreeting;            gm.GreetPeople("Jimmy Zhang");            Console.ReadKey();        }    }}