private async void BtnUpload_Click(object sender, RoutedEventArgs e) { MusicAddDialog musicAddDialog = new MusicAddDialog(); await musicAddDialog.ShowAsync(); if (musicAddDialog.result != null) { musicAddDialog.result.Artist = current.Index; musicAddDialog.result.Genre++; musicAddDialog.result.IsOpen = 1; musicView.AddMusic(musicAddDialog.result); await new MessageDialog("음악을 성공적으로 등록하였습니다.").ShowAsync(); MusicAdded?.Invoke(this, null); } }