private async void ShowArtistFromStoryWindow(int?itemId) { var storyArtists = StoryView.GetStoryArtists(); GetItem(ArtistView, itemId); var result = await _navigationService.ShowDialogAsync(StoreWindows.ArtistWindow); if (result ?? false) { StoryView.AddStoryArtist(storyArtists, ArtistView.Item.Id); } }