using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace 委托学习{    class Program    {        static void Main(string[] args)        {            Program p = new Program();            p.Greeting("谢峰", p.chineseGreeting);            p.Greeting("sam", p.USGreeting);            Console.ReadKey();        }        //声明一个委托        public delegate void GreetingDelegate(string name);        public void Greeting(string name, GreetingDelegate callback)        {            callback(name);        }        public void chineseGreeting(string name)        {            Console.WriteLine("你好，傻逼 "+name);        }        public void USGreeting(string name)        {            Console.WriteLine("hello,guy!"+" "+name);        }    }}