ExpiryDate - не принимается Plaza

var orderBuy = new Order
                {                  
                    ExpiryDate = DateTime.MaxValue,
                    Portfolio = base.Portfolio,
                    Security = security,
                    Type = OrderTypes.Limit,
                    Volume = _volumesToTrade[security.Code],
                    Direction = OrderDirections.Buy,
                    Price = lastPrice,
                };