Inheritance: INotifyPropertyChanging, INotifyPropertyChanged
 partial void DeleteAnswer(Answer instance);
 partial void UpdateAnswer(Answer instance);
 partial void InsertAnswer(Answer instance);
 private void detach_Answer(Answer entity)
 {
     this.SendPropertyChanging();
     entity.ResponseSet = null;
 }
 private void detach_Answer(Answer entity)
 {
     this.SendPropertyChanging();
     entity.Question = null;
 }
 private void attach_Answer(Answer entity)
 {
     this.SendPropertyChanging();
     entity.Question = this;
 }