public void TakeMoney(Bill bill)
{
if (!Bill.Validate(bill))
{
Console.WriteLine("The bill {0} is not valid! Unacceptablle!!!", (int)bill);
return;
}
if (bills.ContainsKey(bill))
{
bills[bill]++;
}
else
{
bills.Add(bill, 1);
}
total += bill.Value;
}
