public void Save()
 {
     PromoList.SavePromo();
     SmallPromo.SavePromo();
     BigPromo.SavePromo();
 }
 public PromoSettingsVM(PromoList promoList, SmallPromo smallPromo, BigPromo bigPromo)
 {
     PromoList  = promoList;
     SmallPromo = smallPromo;
     BigPromo   = bigPromo;
 }