private void AddOfferVoucher(OfferVoucher voucher)
{
if (Discounts.Count(x => x.GetType() == typeof(OfferVoucher)) > 0)
{
ErrorInBasket = true;
ErrorMessage = "You can only have one offer voucher active at one time";
return;
}
string errorMessage = string.Empty;
if (!voucher.DiscountIsValidForBasket(this, out errorMessage))
{
ErrorInBasket = true;
ErrorMessage = errorMessage;
return;
}
}