public static IQueryable<PetShop.Core.Data.Order> ByOrderId(this IQueryable<PetShop.Core.Data.Order> queryable, int orderId, params int[] additionalValues)
        {
            var orderIdList = new List<int> { orderId };

            if (additionalValues != null)
                orderIdList.AddRange(additionalValues);

            if (orderIdList.Count == 1)
                return queryable.ByOrderId(orderIdList[0]);

            return queryable.ByOrderId(orderIdList);
        }
        public static IQueryable<Petshop.Data.Entities.Order> ByOrderId(this IQueryable<Petshop.Data.Entities.Order> queryable, System.Int32 orderId, params System.Int32[] additionalValues)
        {
            var orderIdList = new List<System.Int32> { orderId };

            if (additionalValues != null)
                orderIdList.AddRange(additionalValues);

            if (orderIdList.Count == 1)
                return queryable.ByOrderId(orderIdList[0]);

            return queryable.ByOrderId(orderIdList);
        }