Inheritance: INotifyPropertyChanging, INotifyPropertyChanged
 partial void DeleteSection(Section instance);
 partial void UpdateSection(Section instance);
 partial void InsertSection(Section instance);
		private void detach_Sections(Section entity)
		{
			this.SendPropertyChanging();
			entity.User = null;
		}
		private void attach_Sections(Section entity)
		{
			this.SendPropertyChanging();
			entity.User = this;
		}
		private void detach_Sections(Section entity)
		{
			this.SendPropertyChanging();
			entity.Greenhouse = null;
		}