> > To send a FIN to the remote site, you have to call Shutdown, not Close.
> > When the remote acknoledge
> > the end of connection, you get the OnSessionClosed event triggered.

> Thanks for Francois.Following your words,when the server don't call the
> 'shutdown()',does it mean that the second FIN can't be sent to client,even
> if it has received the client's FIN?

Either party (client or server) can call Shutdown to gracefully terminate the 
connection. Winsock
does the sequence you described and both parties receive the OnSessionClosed 

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