using System.Collections.Generic;
public static void Main()
var encrypter = new Encrypter();
string textToEncrypt = "hello world";
string encryptedText = encrypter.Encrypt(textToEncrypt);
string decryptedText = encrypter.Decrypt(encryptedText);
Console.WriteLine("initial text: {0}", textToEncrypt);
Console.WriteLine("encrypted text: {0}", encryptedText);
Console.WriteLine("decrypted text: {0}", decryptedText);
public string Encrypt(string text)
public string Decrypt(string text)