using System;

public class Program

{

    public static void Main()

    {

        //Write a C# Sharp program to create a new string which is 4 copies of the 2 front characters of a given string. If the given string length is less than 2 return the original string.

        Console.WriteLine("Daniel Mosqueda Alfaro 1-E");

        Console.WriteLine(test("C Sharp"));

        Console.WriteLine(test("JS"));

        Console.WriteLine(test("a"));

        Console.ReadLine();

    }

    public static string test(string str)

    {

        return str.Length < 2 ? str : str.Substring(0, 2) + str.Substring(0, 2) + str.Substring(0, 2)  + str.Substring(0, 2);

    }

}

​