C # Mono TcpClient Кодирование Windows/Linux

Я написал небольшой частный сервер чата, который я хочу запустить под Linux Ubuntu (Mono). Если я запустил его с Windows, проблем не будет.

OK теперь есть какой-то код.

Это Клиент:

    static void Main(string[] args)
    {
        TcpClient client = new TcpClient();
        client.Connect("192.168.0.1", 8080);
        StreamWriter sw = new StreamWriter(client.GetStream());
        sw.WriteLine(ENCString("Hello World", "123"));
        sw.Flush();
        StreamReader sr = new StreamReader(client.GetStream());
        Console.WriteLine(DECString(sr.ReadLine(), "123"));
        //Output on Console is 'Hello World'
        Console.ReadLine();
    }
    static string ENCString(string clearText, string Password)
    {
        byte[] clearBytes = System.Text.Encoding.Unicode.GetBytes(clearText);
        PasswordDeriveBytes pdb = new PasswordDeriveBytes(Password, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
        byte[] encryptedData = EncryptString(clearBytes, pdb.GetBytes(32), pdb.GetBytes(16));
        return Convert.ToBase64String(encryptedData);
    }
    static private byte[] EncryptString(byte[] clearText, byte[] Key, byte[] IV)
    {
        MemoryStream ms = new MemoryStream();
        Rijndael alg = Rijndael.Create();
        alg.Key = Key;
        alg.IV = IV;
        CryptoStream cs = new CryptoStream(ms, alg.CreateEncryptor(), CryptoStreamMode.Write);
        cs.Write(clearText, 0, clearText.Length);
        cs.Close();
        byte[] encryptedData = ms.ToArray();
        return encryptedData;
    }
    static string DECString(string cipherText, string Password)
    {
        byte[] cipherBytes = Convert.FromBase64String(cipherText);
        PasswordDeriveBytes pdb = new PasswordDeriveBytes(Password, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
        byte[] decryptedData = DecryptString(cipherBytes, pdb.GetBytes(32), pdb.GetBytes(16));
        return System.Text.Encoding.Unicode.GetString(decryptedData);
    }
    static private byte[] DecryptString(byte[] cipherData, byte[] Key, byte[] IV)
    {
        MemoryStream ms = new MemoryStream();
        Rijndael alg = Rijndael.Create();
        alg.Key = Key;
        alg.IV = IV;
        CryptoStream cs = new CryptoStream(ms, alg.CreateDecryptor(), CryptoStreamMode.Write);
        cs.Write(cipherData, 0, cipherData.Length);
        cs.Close();
        byte[] decryptedData = ms.ToArray();
        return decryptedData;
    }

Это сервер:

    static void Main(string[] args)
    {
        TcpListener listener = new TcpListener(IPAddress.Any, 8080);
        listener.Start();
        TcpClient client = listener.AcceptTcpClient();
        StreamReader sr = new StreamReader(client.GetStream());
        string s = DECString(sr.ReadLine(),"123");
        Console.WriteLine(s);
        //Output on Console is 'é¡æ¼¨â§¡æ¾o World'
        StreamWriter sw = new StreamWriter(client.GetStream());
        sw.WriteLine(ENCString(s, "123"));
        sw.Flush();
        Console.ReadLine();
    }
    static string ENCString(string clearText, string Password)
    {
        byte[] clearBytes = System.Text.Encoding.Unicode.GetBytes(clearText);
        PasswordDeriveBytes pdb = new PasswordDeriveBytes(Password, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
        byte[] encryptedData = EncryptString(clearBytes, pdb.GetBytes(32), pdb.GetBytes(16));
        return Convert.ToBase64String(encryptedData);
    }
    private static byte[] EncryptString(byte[] clearText, byte[] Key, byte[] IV)
    {
        MemoryStream ms = new MemoryStream();
        Rijndael alg = Rijndael.Create();
        alg.Key = Key;
        alg.IV = IV;
        CryptoStream cs = new CryptoStream(ms, alg.CreateEncryptor(), CryptoStreamMode.Write);
        cs.Write(clearText, 0, clearText.Length);
        cs.Close();
        byte[] encryptedData = ms.ToArray();
        return encryptedData;
    }
    static string DECString(string cipherText, string Password)
    {
        byte[] cipherBytes = Convert.FromBase64String(cipherText);
        PasswordDeriveBytes pdb = new PasswordDeriveBytes(Password, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
        byte[] decryptedData = DecryptString(cipherBytes, pdb.GetBytes(32), pdb.GetBytes(16));
        return System.Text.Encoding.Unicode.GetString(decryptedData);
    }
    static private byte[] DecryptString(byte[] cipherData, byte[] Key, byte[] IV)
    {
        MemoryStream ms = new MemoryStream();
        Rijndael alg = Rijndael.Create();
        alg.Key = Key;
        alg.IV = IV;
        CryptoStream cs = new CryptoStream(ms, alg.CreateDecryptor(), CryptoStreamMode.Write);
        cs.Write(cipherData, 0, cipherData.Length);
        cs.Close();
        byte[] decryptedData = ms.ToArray();
        return decryptedData;
    }

Что я могу сделать, чтобы исправить это или что я делаю неправильно?

Спасибо за помощь!