如何创建不返回的C＃委托？

Question

由于Func <>委托不采用“ void”，我如何在C＃3.0中获得以下权限

Func<int, int, void> delg = (a, b) => { Console.WriteLine( a + b); };

Answer 1

使用操作而不是Func。

    Action<int, int> delg = (a, b) => { Console.WriteLine( a + b); };

Answer 2

As an alternative to Action<int, int> you can create your own delegate and return and pass in whatever types you want.

public delegate void MyDelegate(int val1, int val2);

use:

MyDelegate del = (a, b) => {Console.WriteLine( a + b); };

Answer 3

    Func<int, int, Action> foo = (a, b) => () => Console.Out.WriteLine("{0}.{1}", a, b);
        foo(1, 2)();

Answer 4

Func and Action are delegate wrappers, Funcs return a value (the name might come from VBs function..?) and Actions dont.

Like CSharpAtl said, since they are both wrappers, you could just as well make your own delate, with a name that makes more sense to you, (like VoidFunc(int val1 ,int val2)) , thought I think Func and Action are pretty standard.