private void DelToPlaylistExecute() { if (ThePlaylist != null) { _selectedMusic = SelectedMusic; var request = new HttpRequestGet(); ValidateKey.GetValideKey(); var resDel = request.DeleteMusicFromPlaylist(ThePlaylist, _selectedMusic, Singleton.Singleton.Instance().SecureKey, Singleton.Singleton.Instance().CurrentUser); resDel.ContinueWith(delegate(Task<string> tmp) { var test = tmp.Result; if (test != null) { CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => { var stringJson = JObject.Parse(test).SelectToken("code").ToString(); if (stringJson == "200") { new MessageDialog(loader.GetString("MusicDelete")).ShowAsync(); UpdatePlaylist.Execute(null); } else { new MessageDialog(loader.GetString("ErrorDeleteMusic") + stringJson).ShowAsync(); } }); } }); } else { new MessageDialog(loader.GetString("ErrorAddPlaylist")).ShowAsync(); } }