1 using System;
 2 using System.Collections.Generic;
 3 using System.Text;
 4 namespace Delegate
 5 {
 6     // 热水器
 7     public class Heater
 8     {
 9         private int temperature;
10         public delegate void BoilHandler(int param); //声明委托
11         public event BoilHandler BoilEvent; //声明事件
12         // 烧水
13         public void BoilWater()
14         {
15             for (int i = 0; i <= 100; i++)
16             {
17                 temperature = i;
18                 if (temperature > 95)
19                 {
20                     if (BoilEvent != null)
21                     { //如果有对象注册
22                         BoilEvent(temperature); //调用所有注册对象的方法
23                     }
24                 }
25             }
26         }
27     }
28 }

1 // 警报器
2 public class Alarm
3 {
4     public void MakeAlert(int param)
5     {
6         Console.WriteLine("Alarm：嘀嘀嘀，水已经 {0} 度了：", param);
7     }
8 }

1 // 显示器
2 public class Display
3 {
4     public static void ShowMsg(int param)
5     { //静态方法
6         Console.WriteLine("Display：水快烧开了，当前温度：{0}度。", param);
7     }
8 }

 1 class Program
 2 {
 3     static void Main()
 4     {
 5         Heater heater = new Heater();
 6         Alarm alarm = new Alarm();
 7         heater.BoilEvent += alarm.MakeAlert; //注册方法
 8         heater.BoilEvent += (new Alarm()).MakeAlert; //给匿名对象注册方法
 9         heater.BoilEvent += Display.ShowMsg; //注册静态方法
10         heater.BoilWater(); //烧水，会自动调用注册过对象的方法
11     }
12 }