private void AddMusicToCartExecute() { _selectedMusic = SelectedMusic; var request = new HttpRequestGet(); var post = new HttpRequestPost(); ValidateKey.GetValideKey(); var res = post.SaveCart(_selectedMusic, null, Singleton.Singleton.Instance().SecureKey, Singleton.Singleton.Instance().CurrentUser); res.ContinueWith(delegate(Task<string> tmp2) { var res2 = tmp2.Result; if (res2 != null) { CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => { new MessageDialog(loader.GetString("ProductAddToCart")).ShowAsync(); }); } }); }