partial void DeleteCTHD(CTHD instance);
partial void UpdateCTHD(CTHD instance);
private void detach_CTHDs(CTHD entity)
{
this.SendPropertyChanging();
entity.Hang = null;
}
partial void InsertCTHD(CTHD instance);
private void attach_CTHDs(CTHD entity)
{
this.SendPropertyChanging();
entity.Hang = this;
}