using System;

​

class Program {

    static bool IsPalindrome(string s) {

        s = s.ToLower().Replace(" ", ""); // Convert to lowercase and remove spaces

        char[] arr = s.ToCharArray();

        Array.Reverse(arr);

        return new string(arr) == s;

    }

​

    static void Main() {

        Console.WriteLine(IsPalindrome("ANINA")); // True

    }

}

​