public void SendPrint()
   {
       byte[] sendBytes;
       sendBytes = BmpToBytes(getScreen()); //Convert image to bytes array
       streamWriter.WriteLine(sendBytes.Length); //Send the binary header
       streamWriter.Flush();
       networkStream.Write(sendBytes, 0, sendBytes.Length); //Send the image bytes
       networkStream.Flush();
   }

private void ReceivingScreens()
   {
       while (ReceivePrint)
       {
           strInput.Append("{SCREENDESKTOP}");
           streamWriter.WriteLine(strInput);   //Send the request
           streamWriter.Flush();
           strInput.Remove(0, strInput.Length);
           int size;
           try
           {
               //get the image size
               size = int.Parse(streamReader.ReadLine()); **//Error happens here**
           }
           catch
           {
               MessageBox.Show("WRONG");
               return;
           }
           byte[] TOTAL = new byte[0];
           byte[] parcial;
           while (TOTAL.Length < size)
           {
               //Get lenght of some image bytes
               parcial = new byte[ConexaoServer.ReceiveBufferSize];
               //Get some image bytes
               networkStream.Read(parcial, 0, ConexaoServer.ReceiveBufferSize);
               //Joins all bytes
               TOTAL = JoinBytes(TOTAL, parcial);
               networkStream.Flush();
               System.Threading.Thread.Sleep(100);
           }
           try
           {
               picdesktop.Image = BytesToImg(TOTAL); //Convert bytes to image
           }
           catch (Exception exp)
           {
               MessageBox.Show(exp.Message);
           }
           Application.DoEvents();
       }
   }