//answer
        public int AddAnswer(Answer answer, int idQuestion)
        {
            AnswerEntity ae = new AnswerEntity();
            ae.Answer = answer.AnswerText;
            ae.Correct = answer.Correct;
            ae.Question = data.QuestionEntities.First(x => x.IdQuestion == idQuestion);

            data.SaveChanges();

            return ae.IdAnswer;
        }
 public List<Answer> GetAnswers(int IdQuestion)
 {
     List<Answer> res= new List<Answer>();
     var answers = data.AnswerEntities.Where(x => x.Question.IdQuestion == IdQuestion);
     foreach (var answer in answers)
     {
         Answer answerTemp = new Answer();
         answerTemp.IdAnswer = answer.IdAnswer;
         answerTemp.AnswerText = answer.Answer;
         answerTemp.Correct = answer.Correct;
         res.Add(answerTemp);
     }
     return res;
 }