public IActionResult AddQuestion(int id, NewQuestionViewModel model)
        {
            SurveyQuestion question = new SurveyQuestion();

            question.Question     = model.Question;
            question.ParentSurvey = _surveyService.GetSurveyById(id);
            if (ModelState.IsValid)
            {
                _surveyService.AddQuestion(question);
                return(RedirectToAction("Questions", new { id = question.ParentSurvey.Id }));
            }

            return(View(model));
        }