public MainViewModel(IKartotekaService service)
{
if (service == null)
{
throw new ArgumentNullException("service", "service is null");
}
_service = service;
this.OpenAddBookWinCommand = new RelayCommand(OpenAddBookWin);
}
public AddBookViewModel(IKartotekaService service)
{
if (service == null)
{
throw new ArgumentNullException("service", "service is null");
}
_service = service;
this.NewBook = new Book();
this.Authors = new ObservableCollection <Author>();
}
