public OrderPlaced(Guid conferenceId, OrderTotal orderTotal, DateTime reservationExpirationDate, string accessCode)
{
ConferenceId = conferenceId;
OrderTotal = orderTotal;
ReservationExpirationDate = reservationExpirationDate;
AccessCode = accessCode;
}
private void Handle(OrderPlaced evnt)
{
_id = evnt.AggregateRootId;
_conferenceId = evnt.ConferenceId;
_total = evnt.OrderTotal;
_accessCode = evnt.AccessCode;
_status = OrderStatus.Placed;
}