partial void DeleteDangnhap(Dangnhap instance);
partial void UpdateDangnhap(Dangnhap instance);
private void detach_Dangnhaps(Dangnhap entity)
{
this.SendPropertyChanging();
entity.Nguoidung = null;
}
partial void InsertDangnhap(Dangnhap instance);
private void attach_Dangnhaps(Dangnhap entity)
{
this.SendPropertyChanging();
entity.Nguoidung = this;
}