public SessionPortListener() : base(IntPtr.Zero)
        {
            callbacks = new alljoyn_sessionportlistener_callbacks()
            {
                accept_session_joiner = this.accept_session_joiner,
                session_joined        = this.session_joined
            };
            var handle = alljoyn_sessionportlistener_create(callbacks, IntPtr.Zero);

            base.SetHandle(handle);
        }
 internal static extern IntPtr alljoyn_sessionportlistener_create(alljoyn_sessionportlistener_callbacks callbacks, IntPtr context);