private void General(Discount discount)
        {
            using (Session session = _login.CreateSession(false, false))
            {
                TowaryModule tm = TowaryModule.GetInstance(session);

                using (ITransaction transaction = session.Logout(true))
                {
                    PrzecenaOkresowa enovaDiscount = new PrzecenaOkresowaCeny();
                    tm.PrzecenyOkres.AddRow(enovaDiscount);

                    if (!string.IsNullOrEmpty(discount.Name)) enovaDiscount.Nazwa = discount.Name;
                    enovaDiscount.Kierunek = KierunekCeny.Rozchod;
                    enovaDiscount.Okres = discount.GetFromTo();
                    enovaDiscount.Typ = TypPrzecenyOkresowej.Ogólna;

                    foreach (int productId in discount.Details.Products)
                    {
                        PrzecenaOkresowaTowaru enovaProductDiscount = new PrzecenaOkresowaTowaru
                        {
                            PrzecenaOkresowa = enovaDiscount,
                            Towar = tm.Towary[productId]
                        };

                        tm.PrzecenyOkresTwr.AddRow(enovaProductDiscount);

                        if (discount.DiscountType == DiscountType.ByPercentage)
                        {
                            enovaProductDiscount.Rabat = discount.Details.DiscountPercent;
                        }
                        else if(discount.DiscountType == DiscountType.ByValue)
                        {
                            enovaProductDiscount.Netto = discount.Details.DiscountValue;
                        }
                    }

                    enovaDiscount.Stan = StanPrzeceny.Zatwierdzona;

                    transaction.Commit();
                }

                session.Save();
            }
        }

    public sealed class Discount
    {
        //Public - references
        public DiscountDetails Details { get; set; }

        //Public - date
        public Date CreateDate { get; set; }
        public Date FromDate { get; set; }
        public Date ToDate { get; set; }

        //Public - int
        public int CampaignId { get; set; }

        //Public - bool
        public bool AllClients { get; set; }

        //Public - string
        public string Name { get; set; }
        public string CreateInformation { get; set; }
        public string AdditionalInformation { get; set; }

        //Public - enum
        public DiscountRange DiscountRange { get; set; }
        public DiscountType DiscountType { get; set; }

        //CTOR
        public Discount()
        {
            Details = new DiscountDetails();
        }

        //Public
        public bool Ok()
        {
            return Details.Products.Any();
        }

        public FromTo GetFromTo()
        {
            Date dateFrom = FromDate;
            Date dateTo = ToDate;

            if (dateFrom == Date.Empty) dateFrom = Date.MinValid;
            if (dateTo == Date.Empty) dateTo = Date.MaxValid;

            return new FromTo(dateFrom, dateTo);
        }
    }