using System;

public class Program

{

    public static void Main()

    {

        DisplayResult();

        Console.ReadLine();

    }

    private static void DisplayResult()

    {

        string question = " what's your first name? " ;

        Console.Write(question);

        string answer = Console.ReadLine();

        char[] firstNameArray = answer.ToCharArray();

        Array.Reverse(firstNameArray);

        Console.WriteLine(firstNameArray);

    }

}

​