public async Task <bool> ValidateId(Discount Discount)
        {
            DiscountFilter DiscountFilter = new DiscountFilter
            {
                Skip = 0,
                Take = 10,
                Id   = new LongFilter {
                    Equal = Discount.Id
                },
                Selects = DiscountSelect.Id
            };

            int count = await UOW.DiscountRepository.Count(DiscountFilter);

            if (count == 0)
            {
                Discount.AddError(nameof(DiscountValidator), nameof(Discount.Id), ErrorCode.IdNotExisted);
            }

            return(count == 1);
        }