Action<> and func<> in C #

In fact, both of them are the abbreviated form of "agent" entrusted.

First, "action<>" specifies that only input parameters, no return value of the delegate

Delegate's Code:

[CSharp]View Plaincopy

1. public delegate  void mydelegate (string str);   
2. public static void hellowchinese (string strchinese)   
3. {&NBSP;&NBSP;
4.     console.writeline (
5.      console.readline ();   
6. }  
7. &NBSP;&NBSP;
8. Mydelegate d = new mydelegate (hellowchinese);   
9. d (

After using the action:

[CSharp]View Plaincopy

1. Public static void Hellowchinese (string strchinese)
2. {
3. Console.WriteLine ("Good morning," + Strchinese);
4. Console.ReadLine ();
5. }
7. action<string> action = Hellowchinese;
8. Action ("Spring.");

is tantamount to omitting the steps to define a delegate.

Second, func<> this and the above is the same, the difference is that there is a return value!

[CSharp]View Plaincopy

1. Public static string Helloenglish (string strenglish)
2. {
3. return "Hello." + strenglish;
4. }
6. func<String, string> f = helloenglish;
7. Console.WriteLine (f ("Srping ji"));
8. Console.ReadLine ();

Action<> and Func<> in C #;