partial void DeletePartGroupPart(PartGroupPart instance);
partial void UpdatePartGroupPart(PartGroupPart instance);
private void detach_Parts(PartGroupPart entity)
{
this.SendPropertyChanging();
entity.PartGroup = null;
}
partial void InsertPartGroupPart(PartGroupPart instance);
private void attach_Parts(PartGroupPart entity)
{
this.SendPropertyChanging();
entity.PartGroup = this;
}