partial void DeleteHangHoa(HangHoa instance);
partial void UpdateHangHoa(HangHoa instance);
private void detach_HangHoas(HangHoa entity)
{
this.SendPropertyChanging();
entity.ChatLieu = null;
}
partial void InsertHangHoa(HangHoa instance);
private void attach_HangHoas(HangHoa entity)
{
this.SendPropertyChanging();
entity.ChatLieu = this;
}