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

namespace Sample001
{
    public delegate void InformHandle(object sender);
    public class JIA
    {
        public event InformHandle EatOver;
        public void eat()
        {
            Console.WriteLine("吃饭中......");
            System.Threading.Thread.Sleep(2000); //吃饭事件两秒
            OnEating();  //这个相当于是一个信号，当运行这个函数的时候会发出一个信号。
        }
        public virtual void OnEating()
        {
            if (EatOver != null)
            {
                EatOver(this);
            }
        }
    }

    public class YI
    {
        public void TakeJiaToWangBa(object sender)
        {
            Console.WriteLine("带"+sender.ToString()+"去网吧！");
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            JIA jia1 = new JIA();
            YI yi1 = new YI();
            jia1.EatOver += new InformHandle(yi1.TakeJiaToWangBa);
            Console.WriteLine("空闲中");
            Console.WriteLine("现在甲不知道在干什么");
            jia1.eat();
            Console.WriteLine("去了网吧通宵一个晚上到了第二天中午");
            jia1.eat();
            Console.ReadKey();
        }
    }
}

jia1.EatOver += new InformHandle(yi1.TakeJiaToWangBa);

        public virtual void OnEating()
        {
            if (EatOver != null)
            {
                EatOver(this);
            }
        }

    public delegate void InformHandle(object sender);