public static void Test()
        {
            Console.WriteLine("Enter your text:");
            string input = Console.ReadLine();

            Console.WriteLine();

            Console.WriteLine("Encrypted: ");
            Console.WriteLine(CaeserCipher.Encrypt(input));

            Console.WriteLine();

            Console.WriteLine("Decrypted: ");
            Console.WriteLine(CaeserCipher.Decrypt(input));

            Console.WriteLine();

            Console.WriteLine("Encrypted then Decrypted: ");
            Console.WriteLine(CaeserCipher.Decrypt(CaeserCipher.Encrypt(input)));

            Console.WriteLine();

            Console.WriteLine("Decrypted then Encrypted: ");
            Console.WriteLine(CaeserCipher.Encrypt(CaeserCipher.Decrypt(input)));
        }
        public static void UnitTest()
        {
            string dummy = "QWERTYUIOPASDFGHJKLZXCVBNM1234567890";

            Debug.WriteLine(dummy);
            Debug.WriteLine(CaeserCipher.Encrypt(dummy));
            Debug.WriteLine(CaeserCipher.Decrypt(CaeserCipher.Encrypt(dummy)));

            Debug.Assert(CaeserCipher.Decrypt(CaeserCipher.Encrypt(dummy)) == dummy);
            Debug.Assert(CaeserCipher.Encrypt(CaeserCipher.Decrypt(dummy)) == dummy);
        }