public static void Run()
{
var car = new AuctionItem("Fast Car");
var bidderTom = new Bidder("Tom");
var bidderDave = new Bidder("Dave");
car.AddBidder(bidderTom);
car.AddBidder(bidderDave);
car.Bid(2500.00M);
car.Bid(3500.00M);
}