I want to use the TcpClient and TcpListener to send an mp3 file over a network. I implemented a solution of this using sockets, but there were some issues so I am investigating a new/better way to send a file.

I create a byte array which looks like this: length_of_filename|filename|file

This should then be transmitted using the above mentioned classes, yet on the server side the byte array I read is completely messed up and I'm not sure why.

The method I use to send:

 public static void Send(String filePath)
    {
        try
        {
            IPEndPoint endPoint = new IPEndPoint(Settings.IpAddress, Settings.Port + 1);
            Byte[] fileData = File.ReadAllBytes(filePath);
            FileInfo fi = new FileInfo(filePath);

            List<byte> dataToSend = new List<byte>();
            dataToSend.AddRange(BitConverter.GetBytes(Encoding.Unicode.GetByteCount(fi.Name))); // length of filename
            dataToSend.AddRange(Encoding.Unicode.GetBytes(fi.Name)); // filename
            dataToSend.AddRange(fileData); // file binary data


            using (TcpClient client = new TcpClient())
            {
                client.Connect(Settings.IpAddress, Settings.Port + 1);

                // Get a client stream for reading and writing.
                using (NetworkStream stream = client.GetStream())
                {
                    // server is ready 
                    stream.Write(dataToSend.ToArray(), 0, dataToSend.ToArray().Length);
                }
            }

        }
        catch (ArgumentNullException e)
        {
            Debug.WriteLine(e);
        }
        catch (SocketException e)
        {
            Debug.WriteLine(e);
        }
    }
}

Then on the server side it looks as follows:

    private void Listen()
    {
        TcpListener server = null;
        try
        {
            // Setup the TcpListener
            Int32 port = Settings.Port + 1;
            IPAddress localAddr = IPAddress.Parse("127.0.0.1");

            // TcpListener server = new TcpListener(port);
            server = new TcpListener(localAddr, port);

            // Start listening for client requests.
            server.Start();

            // Buffer for reading data
            Byte[] bytes = new Byte[1024];
            List<byte> data;

            // Enter the listening loop.
            while (true)
            {
                Debug.WriteLine("Waiting for a connection... ");
                string filePath = string.Empty;

                // Perform a blocking call to accept requests.
                // You could also user server.AcceptSocket() here.
                using (TcpClient client = server.AcceptTcpClient())
                {
                    Debug.WriteLine("Connected to client!");
                    data = new List<byte>();

                    // Get a stream object for reading and writing
                    using (NetworkStream stream = client.GetStream())
                    {
                        // Loop to receive all the data sent by the client.
                        while ((stream.Read(bytes, 0, bytes.Length)) != 0)
                        {
                            data.AddRange(bytes);
                        }
                    }
                }

                int fileNameLength = BitConverter.ToInt32(data.ToArray(), 0);
                filePath = Encoding.Unicode.GetString(data.ToArray(), 4, fileNameLength);
                var binary = data.GetRange(4 + fileNameLength, data.Count - 4 - fileNameLength);

                Debug.WriteLine("File successfully downloaded!");

                // write it to disk
                using (BinaryWriter writer = new BinaryWriter(File.Open(filePath, FileMode.Append)))
                {
                    writer.Write(binary.ToArray(), 0, binary.Count);
                }
            }
        }
        catch (Exception ex)
        {
            Debug.WriteLine(ex);
        }
        finally
        {
            // Stop listening for new clients.
            server.Stop();
        }
    }

Can anyone see something that I am missing/doing wrong?