private void UserControl_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyboardDevice.Modifiers == ModifierKeys.Alt &&
                e.SystemKey == Key.Left)
            {
                controller.MoveToPreviousQuestion();
            }
            else if (e.KeyboardDevice.Modifiers == ModifierKeys.Alt &&
                     e.SystemKey == Key.Right)
            {
                controller.MoveToNextQuestion();
            }
            else if (e.KeyboardDevice.Modifiers == ModifierKeys.Control &&
                     e.Key == Key.D)
            {
                RemoveQuestion.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));

                // Stop the character from being entered in textboxes
                e.Handled = true;
            }
            else if (e.KeyboardDevice.Modifiers == ModifierKeys.Control &&
                     e.Key == Key.S)
            {
                SaveQuestions.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));

                // Stop the character from being entered in textboxes
                e.Handled = true;
            }
            else if (e.Key == Key.Escape)
            {
                CloseCreator.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));
            }
        }
        public void SaveAndSwitchToMainWindow()
        {
            MessageBoxResult decision = MessageBox.Show(
                "Do you want to save question set before closing?",
                "Question",
                MessageBoxButton.YesNo
                );

            if (decision == MessageBoxResult.Yes)
            {
                SaveQuestions.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));
            }

            SwitchToMainWindow();
        }