public DetailViewModel(
            INavigationService navigationService
            , ISerieServiceDB serieServiceDB)
            : base(navigationService)
        {
            this.serieServiceDB = serieServiceDB;

            AddCommand = new DelegateCommand(async() => await AddExecute())
                         .ObservesCanExecute(() => IsNotBusy);
        }
        public FavoriteViewModel(
            INavigationService navigationService
            , ISerieServiceDB serieServiceDB)
            : base(navigationService)
        {
            this.serieServiceDB = serieServiceDB;


            ItemClickCommand = new Command <Serie>(async(item)
                                                   => await ItemClickCommandExecute(item));
        }