public GenreDetailViewModel(IEventAggregator eventAggregator,
ILogger logger,
IGenreService domainService,
IGenreLookupDataService genreLookupDataService,
IDialogService dialogService)
: base(eventAggregator, logger, domainService, dialogService)
{
_genreLookupDataService = genreLookupDataService ?? throw new ArgumentNullException(nameof(genreLookupDataService));
ChangeEditedGenreCommand = new DelegateCommand <Guid?>(OnChangeEditedGenreExecute);
SaveItemCommand = new DelegateCommand(SaveItemExecute, base.SaveItemCanExecute)
.ObservesProperty(() => SelectedItem.Name);
SelectedItem = CreateWrapper(domainService.CreateItem());
Genres = new ObservableCollection <LookupItem>();
UserMode = (!UserMode.Item1, DetailViewState.EditMode, Brushes.LightGray, !UserMode.Item4).ToTuple();
}