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using System; class Program{ public class Cat { private string name; public Cat(string name) { this.name = name; } public delegate void CatCallEventHandler(); //猫叫的委托 public event CatCallEventHandler catevent; //猫叫事件 public void Call() { Console.WriteLine("猫{0}叫：喵，喵，喵", name); if(catevent != null) catevent(); } } public class Mouse { private string name; public Mouse(Cat c, string name) { this.name = name; c.catevent += new Cat.CatCallEventHandler(this.Run); //注册事件 } public void Run() { Console.WriteLine("老鼠{0}开始逃跑", name); } } static void Main(string[] args) { Cat c = new Cat("King"); Mouse m1 = new Mouse(c, "Tom1"); Mouse m2 = new Mouse(c, "Tom2"); c.Call(); Console.ReadKey(); }}

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