public void SubmitBid(Bid bid)
{
if (Bids == null)
Bids = new List<Bid>();
var existingBid = Bids.SingleOrDefault(b => b.Agent.Id == bid.Agent.Id);
if (existingBid != null)
throw new Exception("Can't bid on the same task twice!");
Bids.Add(bid);
}
public void AcceptWinningBid(int bidId)
{
var bid = Bids.SingleOrDefault(b => b.Id == bidId);
WinningBid = bid;
Status = TaskStatus.Completed;
}