private ExeResult ValidPublisherAndGanre(GameModel model) { ExeResult result = new ExeResult(new List <string>()); PublisherModel publisher; ExeResult exeResult = controlPublisher.GetById(model.PublicherId, out publisher); if (publisher == null) { result.Message.Add("Unknown publisher"); } GenreModel genre; exeResult = controlGenre.GetById(model.GenreId, out genre); if (genre == null) { result.Message.Add("Unknown genre"); } return(result); }