public void Decryptor()
{
string expected = "xyz";
string actual = CaesarCypher.Decryptor("zab", 2);
Assert.AreEqual(expected, actual);
}
static void Main()
{
string sentence = "Hello, XYZxyz";
string sentenceEncrypted = CaesarCypher.Encrypt(sentence);
Console.WriteLine(sentenceEncrypted);
Console.WriteLine(CaesarCypher.Decrypt(sentenceEncrypted));
}