public override async void OnNavigatedTo(NavigatedToEventArgs e, Dictionary <string, object> viewModelState) { base.OnNavigatedTo(e, viewModelState); var parameters = NavigationParameters.CreateFromString((string)e.Parameter); string mediaServerId = parameters.MediaServerId; mediaServer = await mediaServerRepository.FindAsync(mediaServerId); if (mediaServer == null) { return; } if (parameters.HasParentDirectoryId) { contentDirectory = mediaServer.GetContentDirectory(parameters.ParentDirectoryId); } else { contentDirectory = mediaServer; } if (contentDirectory == null) { return; } DirectoryItems = contentDirectory.DirectoryItems .ToReadOnlyReactiveCollection() .AddTo(Disposable); if (e.NavigationMode == NavigationMode.New) { await contentDirectory.LoadDirectoryItemsAsync(); } }