private ExpiringSessionRecycler(ExpiringMap <EndPoint, IoSession> map)
 {
     _sessionMap          = map;
     _sessionMap.Expired += new EventHandler <ExpirationEventArgs <IoSession> >(_sessionMap_Expired);
 }
 private ExpiringSessionRecycler(ExpiringMap<EndPoint, IoSession> map)
 {
     _sessionMap = map;
     _sessionMap.Expired += new EventHandler<ExpirationEventArgs<IoSession>>(_sessionMap_Expired);
 }