public MainViewModel()
 {
     Api                  = new EtaApi();
     this.Catalogs        = new ObservableCollection <Catalog>();
     this.Stores          = new ObservableCollection <Store>();
     this.OffersSearch    = new ObservableCollection <Offer>();
     this.SuggestedOffers = new ObservableCollection <Offer>();
 }
        public StoreDetailsViewModel(string storeId)
        {
            Api         = new EtaApi();
            StoreOffers = new ObservableCollection <Offer>();

            Store = App.ViewModel.Stores.Where(item => item.Id == storeId).FirstOrDefault();
            if (Store != null)
            {
                LoadData();
            }
            else
            {
                MessageBox.Show("App.ViewModel.Stores er blevet nultillet... ØV! " + storeId);
            }
        }