public void Withdrawl(decimal amountToWithdrawl)
{
if (amountToWithdrawl < 0)
{
throw new NoNegativeTransactionException();
}
if (amountToWithdrawl > _balance)
{
throw new OverdraftException();
}
_balance -= amountToWithdrawl;
// notify the feds
_fedNotifier.NotifyOfWithdrawl(this, amountToWithdrawl);
}
