get stream in timer

Client.GetStream();

public Bitmap ResizeBitmap(Bitmap b, int nWidth, int nHeight)
      {
          Bitmap result = new Bitmap(nWidth, nHeight);
          using (Graphics g = Graphics.FromImage((Image)result)) g.DrawImage(b, 0, 0, nWidth, nHeight);
          return result;
      }

      NetworkStream myns;
      byte[] arrImage;

      private void timer1_Tick(object sender, EventArgs e)
      {

          timer1.Enabled = false;


          Bitmap bt;
          bt = new Bitmap(CaptureScreen.CaptureDesktopWithCursor());

          pictureBox1.Image = ResizeBitmap(bt, 877, 482);

          MemoryStream ms = new MemoryStream();
          pictureBox1.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
          arrImage = ms.GetBuffer();
          ms.Close();

          listBox1.SetSelected(0, true);

          ClientInfo clientInfo = (ClientInfo)listBox1.SelectedItem;

          Client = clientInfo.Client;

          Thread t = new Thread(new ParameterizedThreadStart(send));
          t.Start();
          timer1.Enabled = true;

      }


      private void send(object client)
      {
          try
          {
              myns = Client.GetStream();
              BinaryWriter mysw = new BinaryWriter(myns);
              mysw.Write(arrImage);//send the stream to above address

              mysw.Close();
              myns.Close();
              myns.Flush();
              Client.Close();
          }
          catch (Exception e)
          {
              MessageBox.Show(e.Message);
          }


      }

myns = Client.GetStream();