Инжекторы контекста xaml

<View DataContext="{Store Key=viewModels:ProductsViewModel}">
    <Attacher.ContextTriggers>
        <ContextTrigger 
            EventName="Loaded" 
            UseEventArgsAsCommandParameter="False"
            Command="{Context Key=Refresh, StoreKey=viewModels:ProductsViewModel}"/>
    </Attacher.ContextTriggers>
...
</View>

public class ProductsViewModel : ContextObject, IExposable
{
    public Product CurrentProduct
    {
        get { return Get(() => CurrentProduct); }
        set { Set(() => CurrentProduct, value); }
    }

    public ContextSet<Product> Products { get; set; }

    public virtual void Expose()
    {
        Products = new ContextSet<Product>();
        
        this[() => CurrentProduct].PropertyChanged += (sender, args) => Context.Get("GoToProduct").RaiseCanExecuteChanged();
        
        this[Context.Get("GoToProduct")].CanExecute += (sender, args) => args.CanExecute = CurrentProduct != null;
        this[Context.Get("GoToProduct")].Executed += (sender, args) => Navigator.GoTo(args.Parameter);
        this[Context.Refresh].Executed += async (sender, args) =>
        {
            try
            {
                var products = await Bank.Current.GetProducts();
                CurrentProduct = null;
                Products.Clean();
                products.ForEach(p => Products.Add);
            }
            catch (Exception exception)
            {
                Error = Unity.App.Localize(exception.Message);
            }
        };
    }
}