using System;

using System.Collections.Generic;

using System.IO;

using System.Diagnostics;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

class Program

{

    static void Main()

    {

        System.Console.WriteLine("C#. What is C#? It's a one of the languages for .Net. It can to create applications? services and reusable libraries.");

    }

}

​