Program.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Event_Delegate

{

    class Program

    {

        static void Main(string[] args)

        {

            A a = new A(); //定义首领A

            B b = new B(a);

            a.Raise("左");

            Console.ReadLine();

            //====

            var test = new Heater();

            test.Onboiled += TestOnboiled;

            test.Onboiled += TestOnboiled;

            test.Begin();

            Console.ReadKey();

        }

        static void TestOnboiled(object sender, EventArgs e)

        {

            Console.WriteLine("Hello 事件被调用");

        }

    }

     public delegate void RaiseEventHandler(string hand);

    /// <summary>

    /// 首领A

    /// </summary>

    public class A

    {

        /// <summary>

        /// 首领A举杯事件

        /// </summary>

        public event RaiseEventHandler RaiseEvent;

        public void Raise(string hand)

        {

            Console.WriteLine("首领A举杯");

            //调用举杯事件，传入左或右手作为参数

            if (RaiseEvent != null)

            {

                RaiseEvent(hand);

            }

        }

    }

    /// <summary>

    /// 部下B

    /// </summary>

    public class B

    {

        A a;

        public B(A a)

        {

            this.a = a;

            a.RaiseEvent += new RaiseEventHandler(a_raiseEvent);

        }

        void a_raiseEvent(string hand)

        {

            if (hand.Equals("左"))

            {

                Console.WriteLine("部下B发起攻击 ");

            }

        }

    }

}

Client_1.cs:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Threading;

namespace Event_Delegate

{

    class Client_1

    {

    }

    public class Heater

    {

        public event EventHandler Onboiled;

        private void RasieBoiledEvent()

        {

            if (Onboiled == null)

            {

                Console.WriteLine("加热完成，处理订阅事件为空");

            }

            else

            {

                Onboiled(this,new EventArgs());

            }

        }

        private Thread heatThread;

        public void Begin()

        {

            heatTime = 5;

            heatThread = new Thread(new ThreadStart(Heat));

            heatThread.Start();

            Console.WriteLine("加热器已经开启",heatTime);

        }

        private int heatTime;

        private void Heat()

        {

            while (true)

            {

                Console.WriteLine("加热还需要{0} 秒",heatTime);

                if (heatTime == 0)

                {

                    RasieBoiledEvent();

                    return;

                }

                heatTime--;

                Thread.Sleep(1000);

            }

         }

    }

}