internal void AddSession(TSip_Session session)
 {
     if (session != null && !mSipSessions.ContainsKey(session.Id))
     {
         mSipSessions.Add(session.Id, session);
     }
 }
 protected TSIP_Event(TSip_Session sipSession, ushort code, String phrase, TSIP_Message sipMessage, tsip_event_type_t type)
 {
     mSipSession = sipSession;
     mCode       = code;
     mPhrase     = phrase;
     mSipMessage = sipMessage;
     mType       = type;
 }