Palindrome program in c# asp.net

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace palindrome

{

    class Program

    {

        static void Main(string[] args)

        {

       

          Console.WriteLine("Enter a String");

            string str = Console.ReadLine();

            string str1 = "" ;

 

            int i = str.Length;

           

            for (int j = i - 1; j >= 0; j--)

            {

                str1 = str1 + str[j];

            }

            if (str1 == str)

            {

                Console.WriteLine(str1 + " is palindrome");

            }

            else

            {

                Console.WriteLine(str1 + " is not a palindeome");

            }

            Console.ReadLine();

        }

    }

}