public IEnumerable <AnswerViewModel> DisplayAnswers(int questionId)
        {
            IEnumerable <Answer> answers = answerRepository.DisplayAnswers(questionId);
            var     config = new MapperConfiguration(cfg => { cfg.CreateMap <Answer, AnswerViewModel>(); cfg.IgnoreUnmapped(); });
            IMapper mapper = config.CreateMapper();
            IEnumerable <AnswerViewModel> allAnswers = mapper.Map <IEnumerable <Answer>, IEnumerable <AnswerViewModel> >(answers);

            return(allAnswers);
        }