C#

private void Send(string arg)
{
    TcpClient client = new TcpClient(TB_Host.Text, (int)UD_Port.Value);
    FileStream fstream = File.Open(OFD_File.FileName, FileMode.Open);
    NetworkStream nstream = client.GetStream();
    int data = 0;

    while (data > 0)
    {
        data = fstream.ReadByte();
        nstream.WriteByte((byte)data);
    }

    fstream.Close();
    nstream.Close();
    client.Close();
}

public void Listen()
        {
            int port = 21112;
            byte[] result = new byte[1024];
            IPAddress address = IPAddress.Parse("127.0.0.1");
            TcpListener listener = new TcpListener(address, port);
            ipEnd = new IPEndPoint(address, port);
            listener.Start();
            socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            int f = 0;
            object state = new object();
            socket.Connect(ipEnd);

            while (true)
            {
                TcpClient client = listener.AcceptTcpClient();
                NetworkStream ns = client.GetStream();

                f = socket.Receive(result);
                Invoke(new UpdateDisplayDelegate(UpdateDisplay), result);
            }
        }

result = ns.Write(result, 0, int.MaxValue);