如何在C#中编写事件和事件处理程序？

Question

我一直在尝试记住如何在C#中编写事件和事件处理程序一段时间.每当我想在互联网上引用教程时,他们往往都很冗长.

问题是如何在C#中编写事件和事件处理程序？你有一个代码示例,很容易说明如何写这样的？

Answer 1

它们不必冗长:

// declare an event:
public event EventHandler MyEvent;

// raise an event:
var handler = MyEvent;
if(handler != null) handler(this, EventArgs.Empty);

// consume an event with an anon-method:
obj.MyEvent += delegate { Console.WriteLine("something happened"); };

// consume an event with a named method:
obj.MyEvent += SomeHandler;

void SomeHandler(object sender, EventArgs args) {
    Console.WriteLine("something happened");
}

什么是麻烦的？