namespace www.csframework.com
{
   public delegate void MessageHandler(); //消息委托
   class Program
   {
      static void Main(string[] args)
      {
         Mouse m = new Mouse();
         Cat c = new Cat();
         Man man = new Man();
         m.MouseMoving+=new MessageHandler(c.CatMove); //=>指定事件触发
         c.CatMoving += new MessageHandler(man.ManMove);//=>指定时间出发
         Console.WriteLine("Begin:");
         m.MouseMove();
      }
   }
   class Mouse
   {
      public event MessageHandler MouseMoving;
      
      
      public void MouseMove()
      {
         Console.WriteLine("A mouse is moving.");
         MouseMoving();
      }
      
   }
   class Cat
   {
      public MessageHandler CatMoving;
      public void CatMove()
      {
         Console.WriteLine("A cat find the mouse,and catches it.");
         CatMoving();
      }
   }
   class Man
   {
      public void ManMove()
      {
         Console.WriteLine("A man finds his cat are eating a mouse.");
      }
   }
}