using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        string str = "Madam";

        var strReverse = str.ToLower().Reverse();

        Console.WriteLine(str.ToLower().SequenceEqual(strReverse)? "Palindrome" : "Not Palindrome");

        Console.WriteLine(IsPalindrome(str)? "Palindrome" : "Not Palindrome");

    }

   public static bool IsPalindrome(string word)

    {

        string testWord = word;

        for(int i = 0; i < word.Length/2; i++)

        {

            if(char.ToLower(testWord[i]) != char.ToLower(testWord[testWord.Length - i - 1]))

               return false;

        }

        return true;

    }

}