palindrome.cs

using System;
using System.Linq;
using System.Text.RegularExpressions;

namespace Algorithms.Strings
{
    public class Palindrome
    {
        public static void Main()
        {
            bool result = false;
            result = IsPalindrome("abba");
            Console.WriteLine(result);
            result = IsPalindrome("abbccbbA");
            Console.WriteLine(result);
            result = IsPalindrome("Mr. Owl ate my metal worm");
            Console.WriteLine(result);
        }

        public static bool IsPalindrome(string source)
        {
            source = source.ToLower();
            source = Regex.Replace(source, @"[^0-9A-Za-z]", "");
            string reverse = new string(Enumerable.Range(1, source.Length).Select(i => source[source.Length - i]).ToArray());
            return reverse == source;
        }
    } 
}