Push Notifications

   Hi Mike,

You can pass client-specific arguments (in the last parameter clientArgs shown below) when registering the callback:

        public void RegisterCallback(ServerNotifyDelegate serverDelegate, ClientNotifyDelegate clientDelegate,
                                                     Object userToken, params Object[] clientArgs)

These clientArgs are stored with the NotificationSubscriber, which is available to the service.  So for that sample, you could do something like this to get the arguments for each subscriber:

        foreach (var subscriber in __notificationManager.GetSubscribers(__serviceKey)) {
          var args = subscriber.ClientArguments;
        }

Hope this helps!