Code for Reverse String

using System;
namespace Console_ReverseString
{
    class ReverseString
    {
        //Using While Loop

        public void dispRevStr()
        {
            string Str, Revstr = "";
            int Length;

            Console.Write("Enter A String : ");
            Str = Console.ReadLine();

            Length = Str.Length - 1;

            while (Length >= 0)
            {

                Revstr = Revstr + Str[Length];
                Length--;

            }

            Console.WriteLine("Reverse  String  Is  {0}", Revstr);
        }


        //Using For loop

        //public void dispRevStr()
        //{
        //    string Str, Revstr = "";
        //    Console.Write("Enter A String : ");
        //    Str = Console.ReadLine();

        //    for (int i = Str.Length - 1; i >= 0; i--)
        //    {

        //        Revstr = Revstr + Str[i];
        //    }

        //    Console.WriteLine("Reverse  String  Is  {0}", Revstr);
        //    Console.ReadLine();
        //}

        static void Main(string[] args)
        {
            ReverseString rs = new ReverseString();
            rs.dispRevStr();
            Console.ReadKey();
        }
    }
}