partial void DeleteLop(Lop instance);
partial void UpdateLop(Lop instance);
private void detach_Lops(Lop entity)
{
this.SendPropertyChanging();
entity.Khoa = null;
}
partial void InsertLop(Lop instance);
private void attach_Lops(Lop entity)
{
this.SendPropertyChanging();
entity.Khoa = this;
}