void UpdatePlaylist() { var playlist = YoutubePlaylist; if (playlist == null) { playlist = YoutubeApisProcessor.Current.CreatePlaylist(dueTitle); } YoutubeApisProcessor.Current.FillPlaylist(playlist, VideoData.Select(z => z.YoutubeClip).Where(z => z != null)); Wrap.Store <YoutubePlaylist>(playlist); this.NotifyByExpression(z => z.Status); }