Inheritance: INotifyPropertyChanging, INotifyPropertyChanged
 private void detach_Question_DependentQuestions(Question entity)
 {
     this.SendPropertyChanging();
     entity.DependentQuestion = null;
 }
 private void detach_Question(Question entity)
 {
     this.SendPropertyChanging();
     entity.Category = null;
 }
 private void attach_Question(Question entity)
 {
     this.SendPropertyChanging();
     entity.Category = this;
 }
 partial void DeleteQuestion(Question instance);
 partial void UpdateQuestion(Question instance);
 partial void InsertQuestion(Question instance);