/// <summary> /// /// </summary> /// <returns></returns> public List <Proposal> FindAllProposalsWithoutSection() { var allProposals = ProposalRepository.All(); var proposalsExistingInSections = SectionRepository.FindAllProposalsExistingInSections(); List <Proposal> proposals = allProposals.Except(proposalsExistingInSections).ToList(); return(proposals); }