private static void PalindromeNumberTest() { Console.WriteLine("\nPalindrome Number question:"); PalindromeNumber palindromeNumber = new PalindromeNumber(); int[] testNumbers = new [] { 121, -121, 10 }; foreach (int number in testNumbers) { Console.WriteLine("{0} -> {1}", number, palindromeNumber.IsPalindromeTwo(number)); } }