public static void UpdateDiscountType(DiscountType discountType)
 {
     CommonDAL.UpdateEntity<DiscountType>(discountType);
 }
		public static void AddDiscountType(DiscountType discountType)
		{
			CommonDAL.AddEntity<DiscountType>(discountType, p => p.Name == discountType.Name
                                                                && p.ProductId == discountType.ProductId
                                                                && p.Rounds == discountType.Rounds);
		}