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);
        }