detect palindrome text or not.

palindrome

            string str = string.Empty;

            Console.WriteLine("Enter a String");

            string s = Console.ReadLine();

            int i = s.Length;
            
            for (int j = i - 1; j >= 0; j--)
            {
                str = str + s[j];
            }
            if (str == s)
            {

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

            }
            else
            {
                Console.WriteLine(s + " is not a palindeome");
            }