public TransportExchange(LongPollingTransport _parent, ITransportListener _listener, IList <IMutableMessage> _messages,
                          LongPollingRequest _lprequest)
 {
     parent    = _parent;
     listener  = _listener;
     messages  = _messages;
     request   = null;
     lprequest = _lprequest;
     isSending = true;
 }
 public TransportExchange(LongPollingTransport _parent, ITransportListener _listener, IList<IMutableMessage> _messages,
         LongPollingRequest _lprequest)
 {
     parent = _parent;
     listener = _listener;
     messages = _messages;
     request = null;
     lprequest = _lprequest;
     isSending = true;
 }