private void btnEnrol_Click(object sender, RoutedEventArgs e) { try { btnEnrol.IsEnabled = false; MachineEnrolment objMachineEnrolment = new MachineEnrolment(lblGame.Content.ToString().Trim() == String.Empty, _POSDetail.PostionNumber); objMachineEnrolment.Owner = Window.GetWindow(this); objMachineEnrolment.ShowDialog(); } finally { btnEnrol.IsEnabled = true; } }