private void ShowOrQueueNotification(NotificationInfo notificationInfo)
{
// If not notification is presented, create one.
if (_currentNotificationWindow == null)
{
_currentNotificationWindow = new NotificationWindow(notificationInfo);
_currentNotificationWindow.Closed += CurrentNotificationWindow_Closed;
_currentNotificationWindow.Show();
}
else
{
_notificationQueue.Enqueue(notificationInfo);
}
}