using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

    {

​

      public static void Main(string[] args)

{

    try

    {

         Console.iteline ("Enteranumber: ");

        var num=int.Parse(Console. ReadLine());

        Console.WriteLine("Squre of {0} is {1}", num, num*num);

    }

    catch

    {

        Console.Write("Error occurred.");

    }

    finally

    {

        Console.Write("Re-try withadifferent number.");

    }

    Console.ReadKey();

}

}

}