1. 申明Deleagate:其实背后是IL编译器为你创造了一个封装函数指针的类,这个类名就是你申明时所用的函数名,例如Delegate void AddDelegate(int, int)。winForm技术中喜欢将AddDelegate称为AddEventHandler,所以也就有了那么多EventHandler。

2. 申明Event::当Event和前面申明的委托,也就是AddEventHandler联合申明一个事件,例如 public event AddEventHandler addevent, 这个IL编译出来的的是包含函数指针列表的类实例。而addevent()调用,就变成函数列表的调用,官方文字称诸多订阅该事件的委托实例的调用。所以订阅的语句:addevent+= new AddEventHandler(clientDimAdd) ,也就是将这个回调函数加入到列表中,以便事件触发时依次调用。


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