private void detach_Choices(Choice entity)
		{
			this.SendPropertyChanging();
			entity.Question = null;
		}
		private void attach_Choices(Choice entity)
		{
			this.SendPropertyChanging();
			entity.Question = this;
		}
 partial void UpdateChoice(Choice instance);
 partial void DeleteChoice(Choice instance);
 partial void InsertChoice(Choice instance);