partial void DeleteHD_Contact(HD_Contact instance);
 partial void UpdateHD_Contact(HD_Contact instance);
		private void detach_HD_Contact(HD_Contact entity)
		{
			this.SendPropertyChanging();
			entity.HD_Dept = null;
		}
 partial void InsertHD_Contact(HD_Contact instance);
		private void attach_HD_Contact(HD_Contact entity)
		{
			this.SendPropertyChanging();
			entity.HD_Dept = this;
		}