// Constructors
 public AnswerVM()
 {
     answer = new Answer();
 }
 public AnswerVM(Answer a)
 {
     answer = a;
 }
        public void AddAnswer()
        {
            if (AnswerList.Count < 4) {
                if (AnswerText.Trim().Length > 0) {
                    Answer answer = new Answer();
                    answer.QuestionId = Id;
                    answer.Text = AnswerText;
                    answer.IsCorrect = false;
                    answer = MainViewModel.context.Answer.Add(answer);
                    MainViewModel.context.SaveChanges();
                    AnswerList.Add(new AnswerVM(answer));

                    RaisePropertyChanged("AnswerList");
                    RaisePropertyChanged("AmountOfQuestions");
                }
                else {
                    System.Windows.MessageBox.Show("Enter an answer");
                }
            }
        }