public OrderRepository(XMarketPlaceContext xMarketPlaceContext, ShoppingCart shoppingCart)
 {
     _xMarketPlaceContext = xMarketPlaceContext;
     _shoppingCart        = shoppingCart;
 }
 public ShoppingCart(XMarketPlaceContext xMarketPlaceContext)
 {
     _xMarketPlaceContext = xMarketPlaceContext;
 }
        private readonly XMarketPlaceContext _context;// field

        public BaseService(XMarketPlaceContext context)
        {
            _context = context;
        }