public RegistrarRowInfo(string host, string startTime, string addressOfRecord, int expires, string endTime, SipAddressBinding item) { _host = host; _startTime = startTime; _addressOfRecord = addressOfRecord; _expires = expires; _endTime = endTime; Item = item; Observable.Timer(TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1)).ObserveOn(Dispatcher.CurrentDispatcher).Subscribe(DecrementExpires); }