Stop method will immediately disconnect all connected
users and stop accepting any new connections. Further more,
Port that is
used for listening will be freed and you can use it for
some other purpose.
If you try to obtain list or snapshot of currently
connected users at the time you shut down server, you
should do it before you call Stop method,
because it will delete list of all users at that time. To
start server again, call Start method.
Stop Method
