private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                MemoryStream ms = new MemoryStream();
                //Save the picture in memory stream
                pictureBox1.Image.Save(ms, pictureBox1.Image.RawFormat);

                //convert image to binary data
                byte[] buffer = ms.GetBuffer();
                ms.Close();
                //connecting with the server
                TcpClient tcpClient = new TcpClient(textBox1.Text, 11000);

                NetworkStream ns = tcpClient.GetStream();
                BinaryWriter bw = new BinaryWriter(ns);
                //send the stream to the address
                bw.Write(buffer);
            }
            catch (SocketException ex)
            { MessageBox.Show(ex.Message); }
            catch (Exception ex)
            { MessageBox.Show(ex.Message); }
        }