private void btnWaitForFiles_Click(object sender, EventArgs e)
 {
     if (btnWaitForFiles.Text == "Wait For Files")
     {
         try
         {
             Listen.Start(int.Parse(txtPort.Text));
             btnWaitForFiles.Text = "Cancel Waiting";
         }
         catch (Exception ex)
         {
             MessageBox.Show(ex.Message);
         }
     }
     else
     {
         Listen.Stop();
         btnWaitForFiles.Text = "Wait For Files";
         StatusStopped();
     }
 }
 private void FrmMain_FormClosing(object sender, FormClosingEventArgs e)
 {
     Listen.Stop();
     Sender.Close();
 }