C#:“+= anEvent"和“+= new EventHandler(anEvent)"之间的区别 [英] C#: Difference between ' += anEvent' and ' += new EventHandler(anEvent)'

问题描述

获取以下代码:

private void anEvent(object sender, EventArgs e) {
    //some code
}

<小时>

以下有什么区别?

---

What is the difference between the following ?

[object].[event] += anEvent;

//and

[object].[event] += new EventHandler(anEvent);

[更新]

显然，两者没有区别……前者只是后者的语法糖.

Apparently, there is no difference between the two...the former is just syntactic sugar of the latter.

推荐答案

没有区别.在您的第一个示例中，编译器将自动推断您要实例化的委托.在第二个示例中，您明确定义了委托.

There is no difference. In your first example, the compiler will automatically infer the delegate you would like to instantiate. In the second example, you explicitly define the delegate.

在 C# 2.0 中添加了委托推理.因此，对于 C# 1.0 项目，第二个示例是您唯一的选择.对于 2.0 项目，使用推理的第一个示例是我更喜欢在代码库中使用和查看的示例 - 因为它更简洁.

Delegate inference was added in C# 2.0. So for C# 1.0 projects, second example was your only option. For 2.0 projects, the first example using inference is what I would prefer to use and see in the codebase - since it is more concise.

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