using System;

public class Program

{

    public static void Main()

    {

        // * Action Delegate *

        Action<string> PerformActionDoNotReturn = new Action<string>(WriteInConsole);

        // can be also called as PerformActionDoNotReturn.Invoke("asasasas");

        PerformActionDoNotReturn("Yeah i am anAction"); 

        // *Func Delegate*

        Func<int,int>  PerformActionReturnMeSomething = new Func<int,int>(DoubleMyMoney);

        Console.WriteLine(PerformActionReturnMeSomething(10000));

        // *Predicate Delegate*

        Predicate<object> checkStringType = new Predicate<object>(IsThisString);

        Console.WriteLine(checkStringType(123));

        Console.WriteLine(checkStringType("fddfd"));

    }

    static void WriteInConsole(string str)

    {

      Console.WriteLine(str);

    }

    static int DoubleMyMoney(int mymoney)

    {

      return mymoney * mymoney;

    }

    static bool IsThisString(object str)

    {

       return str is string ? true : false;

    }   

}