public IHttpActionResult GetMarketingById(int?MarketingId) { var response = new DataResponse <EntityMarketing>(); var repository = new RepositoryMarketing(); if (MarketingId.HasValue) { response = repository.GetMarketingById(MarketingId.Value, CurrentUserId, CurrentBusinessId); } else { response.Model = new EntityMarketing(); } return(Ok <DataResponse>(response)); }