public void RemovePromotion(PromotionTwoData promotionData)
{
if (_data.IndexOf(promotionData) > -1)
{
_data.Remove(promotionData);
}
}
public void RemovePromotionTwo(PromotionTwoData prom2)
{
this._promotionTwo.RemovePromotion(prom2);
this._productNamesPromoted.RemoveAll(u => u.Contains(prom2.ProductOneName));
this._productNamesPromoted.RemoveAll(u => u.Contains(prom2.ProductTwoName));
}