的含义（）=>操作员在C＃中，如果存在 [英] Meaning of () => Operator in C#, if it exists

问题描述

我这里读了这个有趣的线上，由乔恩飞碟双向的答案。

I read this interesting line here, in an answer by Jon Skeet.

有趣的线是这个，他在那里使用委托主张：

The interesting line is this, where he advocated using a delegate:

Log.Info("I did something: {0}", () => action.GenerateDescription());

问题是，这是什么（）=>运营商，我不知道？我试图谷歌搜索，但因为它是由符号的谷歌不可能有很大帮助，真的。难道我尴尬想念这里的东西吗？

Question is, what is this ()=> operator, I wonder? I tried Googling it but since it's made of symbols Google couldn't be of much help, really. Did I embarrassingly miss something here?

推荐答案

此介绍不带参数的lambda函数（匿名委托），它相当于基本上速记为：

This introduces a lambda function (anonymous delegate) with no parameters, it's equivalent to and basically short-hand for:

delegate void () { return action.GenerateDescription(); }

您还可以添加参数，这样：

You can also add parameters, so:

(a, b) => a + b

这是大致相当于：

delegate int (int a, int b) { return a + b; }

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