C#中，正如属性是对成员变量的封装，事件是对委托的封装。
完整的事件流程：
class Program { static void Main(string[] args) { EventSender sender = new EventSender(); EventRevicer revicer = new EventRevicer(); sender.myEvent += revicer.Action; //invoke the event sender.Active(new MyEventArgs("C# Event")); } } class MyEventArgs:EventArgs { public MyEventArgs(string name) { this.name = name; } public string name { get; set; } } delegate void MyEventHandler(EventSender sender,MyEventArgs e); class EventSender { private MyEventHandler myEventHandler; public event MyEventHandler myEvent { add { myEventHandler += value; } remove { myEventHandler -= value; } } public void Active(MyEventArgs e) { Console.WriteLine("I send the notification"); myEventHandler.Invoke(this, e); } } class EventRevicer { internal void Action(EventSender sender, MyEventArgs e) { Console.WriteLine("I get the notification!"); } }简写的事件流程：
class Program { static void Main(string[] args) { EventSender sender = new EventSender(); EventRevicer revicer = new EventRevicer(); sender.myEvent += revicer.Action; //invoke the event sender.Active(new MyEventArgs("C# Event")); } } class MyEventArgs : EventArgs { public MyEventArgs(string name) { this.name = name; } public string name { get; set; } } class EventSender { public event EventHandler myEvent;//the event public void Active(MyEventArgs e) { Console.WriteLine("I send the notification"); myEvent.Invoke(this, e); } } class EventRevicer { internal void Action(object sender, EventArgs e) { //Type convert MyEventArgs args = e as MyEventArgs; Console.WriteLine("I get the notification! args:{0}",args.name); } } 注：我们平时经常用的简写流程中省略了事件封装的过程，但实际上C# 语言机制内部是有这个对委托的封装过程的。