public BookViewModel(IBooksService booksService)
{
_booksService = booksService;
SaveBookCommand = new DelegateCommand(() => OnSaveBookAsync().ConfigureAwait(true));
EventAggregator <BookInfoEvent> .Instance.Event += LoadBook;
}
public BooksViewModel(IBooksService booksService)
{
_booksService = booksService;
GetBooksCommand = new DelegateCommand(OnGetBooks, CanGetBooks);
AddBookCommond = new DelegateCommand(OnAddBook);
}