private static string Encrypt(string s)
char[] temp = s.ToCharArray();
for (int i = 0; i < s.Length; i++)
string cipher = new string (temp);
private static string Decrypt(string s)
char[] temp = s.ToCharArray();
for (int i = 0; i < s.Length; i++)
string plain = new string (temp);
public static void Main()
string restart = "3 days left";
Console.WriteLine("Press 1 to Encrypt a message and 2 to Decrypt a message"); byte choice = byte.Parse(Console.ReadLine());
Console.WriteLine("Please enter your plaintext to encrypt"); string pt = Console.ReadLine();
Console.WriteLine("Your encrypted message is: " + Encrypt(pt)); Console.WriteLine("Please enter your ciphertext to decrypt"); string ct = Console.ReadLine();
Console.WriteLine("Your decrypted message is: " + Decrypt(ct)); Console.WriteLine("Please enter 1 or 2"); Console.WriteLine("Please Press q to quit, or any other key to continue"); restart = Console.ReadLine();
