public int?Delete(int id) { OfferRepository <Offer> Offerrepo = new OfferRepository <Offer>(); OfferRepository <OfferPhases> OfferrepoP = new OfferRepository <OfferPhases>(); int rta2 = OfferrepoP.DeletePhases(id); int?rta = Offerrepo.Delete(id); if (rta == null) { return(null); } else { return(rta); } }