using System;

​

public class Program

{

    public static void Main()

    {

        Action yepItsTrue = () => Console.WriteLine("Yep, its true.");      

        Action nopeItsFalse = () => {

            Console.WriteLine("Nope. False.");

        };

        Action<string> consoleMsg = (msg) => Console.WriteLine(msg);

        PerformCheck(1 == 2, yepItsTrue, nopeItsFalse); // Delegate reference, similar to passing a function reference in javascript

        PerformCheck(1 == 1, 

            ifTrue: yepItsTrue,

            ifFalse: () => Console.WriteLine("No, no, NO!")); // Anonymous delegate

        PerformCheck(1 == 1, 

            ifTrue: () => consoleMsg("YES!"), // Anonymous delegate that calls another delegate

            ifFalse: () => consoleMsg("NO!"));

        // Last type is return type

        Func<string, string> func = (msg) => {

            Console.WriteLine(msg);

            return msg;

        };

    }

​

    /* PerformCheck only takes "Action"s of type void

     E.g 

        ifTrue: consoleMsg("YES!")  - wont work

        ifTrue: () => consoleMsg("YES!"),  - will work

    As consoleMsg is Action<string> not Action<void>

    */

    static void PerformCheck(bool logic, Action ifTrue, Action ifFalse)

    {

        if (logic)

            ifTrue(); // if logic is true, call the ifTrue delegate

        else

            ifFalse(); // if logic is false, call the ifFalse delegate

    }

}

​

/*

    If you need to return a value from an Action, use Func<T> instead: 

    http://stackoverflow.com/a/8099823/654708

*/