partial void DeleteEntityChiTietDuAn(EntityChiTietDuAn instance);
	partial void InsertEntityChiTietDuAn(EntityChiTietDuAn instance);
	partial void UpdateEntityChiTietDuAn(EntityChiTietDuAn instance);
		private void detach_EntityChiTietDuAns(EntityChiTietDuAn entity)
		{
			this.SendPropertyChanging();
			entity.EntityDuAn = null;
		}