问题描述
我刚刚意识到我可以通过两种方式添加事件处理程序:
I just realized I can add an event handler in two ways:
考虑这样的事件处理程序:
Consider an event handler like so:
private void MyEventHandler()
{}
方法一:实例化一个新的委托
Method 1: Instantiate a new delegate
MyObject.MyEvent += new Action(MyEventHandler);
方法 2:添加事件处理程序而不实例化新委托
Method 2: Add event handler without instantiating a new delegate
MyObject.MyEvent += MyEventHandler;
这两种实现之间有什么区别需要考虑吗?
Is there any difference in between these two implementations that should be considered?
推荐答案
没有区别，生成的IL是一样的..net/c# 2.0 中引入了较短的形式作为一种便利功能，尽管 Visual Studio 仍然在 Tab Completion 上使用第一种形式.
There is no difference, the generated IL is the same. The shorter form was introduced in .net/c# 2.0 as a convenience function, although Visual Studio still does the first form on Tab Completion.
有关更多信息，请参阅此问题.
See this question for some more info.
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