public void ReturnMoney()
{
//we don't manipulate money in here, keep it immutable
MoneyInTransaction = Money.None;
}
public void BuySnack()
{
MoneyInside = MoneyInside + MoneyInTransaction;
MoneyInTransaction = Money.None;
}
public SnackMachine()
{
MoneyInside = Money.None;
MoneyInTransaction = Money.None;
}