private void OnLoaded(object sender, RoutedEventArgs routedEventArgs)
 {
     _window                    = new NotificationPopupWindow(this);
     _window.Topmost            = IsTopmost;
     _window.PopupFlowDirection = PopupFlowDirection;
     _window.PopupContent       = Child;
 }
 private void OnUnloaded(object sender, RoutedEventArgs e)
 {
     _window.Close();
     _window = null;
 }
 private void OnLoaded(object sender, RoutedEventArgs routedEventArgs)
 {
     _window = new NotificationPopupWindow(this);
     _window.PopupContent = Child;
 }