public void Remove(MenuNotificationViewModel notificationVm)
        {
            if (notificationVm == null)
            {
                throw new ArgumentNullException(nameof(notificationVm));
            }

            notifications.Remove(notificationVm);
            repository.Remove(notificationVm.MenuNotification);

            NotificationCollectionChanged?.Invoke(this, new NotificationCollectionChangedEventArgs(NotificationCollectionChangedAction.Remove, notificationVm.MenuNotification));
        }
        public void Add(MenuNotification notification)
        {
            if (notification == null)
            {
                throw new ArgumentNullException(nameof(notification));
            }

            MenuNotificationViewModel notificationVm = new MenuNotificationViewModel(notification);

            notificationVm.RequestClose += (s, e) => Remove(s as MenuNotificationViewModel);

            notifications.Add(notificationVm);

            //Program.MainWindow.Invoke(() =>
            //{
            //    notifications.Add(notificationVm);
            //});

            //notification.IsDirty = true;

            NotificationCollectionChanged?.Invoke(this, new NotificationCollectionChangedEventArgs(NotificationCollectionChangedAction.Add, notification));
        }
 private void _Remove(MenuNotificationViewModel notification)
 {
     notifications.Remove(notification);
     repository.Remove(notification.MenuNotification);
 }