public PriceModel(Ceny price) { Id = price.Id; RealPrice = price.Cena; Discount = price.Rabat; DiscountPrice = Discount == null ? RealPrice : RealPrice * (1 - (decimal)Discount / 100); Promotion = price.CennikId == null ? null : PromoPresenter.GetPromotionById(price.CennikId); Product = price.TowarId == null ? null : ProductPresenter.GetProductById(price.TowarId); }