private List <Musteri> ListAllMusteri() { try { using (var musteriBussines = new MusteriBusiness()) { List <Musteri> musteri = musteriBussines.SelectAllMusteri(); return(musteri); } } catch (Exception ex) { LogHelper.Log(LogTarget.File, ExceptionHelper.ExceptionToString(ex), true); throw new Exception("Musteri doesn't exists."); } }