what is differance between Action(T) and delegate?

Question

I need to know the need of Action(T) and give me example

Raj Kumar · Answer

When you use the Action delegate you do not have to explicitly define a delegate that encapsulates a method with a single parameter. using System; using System.Windows.Forms; delegate void DisplayMessage(string message); public class TestCustomDelegate { public static void Main() { DisplayMessage messageTarget; if (Environment.GetCommandLineArgs().Length > 1) messageTarget = ShowWindowsMessage; else messageTarget = Console.WriteLine; messageTarget(Hello World!); } private static void ShowWindowsMessage(string message) { MessageBox.Show(message); } }