public void BuyForBonuses(CreditCard.PremiumCard card_type, int value)
{
if (card_type.bonusBalance < value)
{
throw new Exception("Недостаточно бонусов");
}
else
{
card_type.bonusBalance -= value;
}
}
public void CashOut(CreditCard.PremiumCard card_type, double value) => card_type.CashIn(value);