public Bid Close(Auction auction) { auction.Close(); return(auction.WinningBid); }
public IEnumerable <Bid> GetBids(Auction auction) { return(auction.Bids); }
public void PlaceBid(Auction auction, Bid bid) { auction.PlaceBid(bid); }
public Bid GetHighestBid(Auction auction) { //Consider return BidDto for public API return(auction.HighestBid); }