private void OnJoin(object sender, JoinMessage args)
{
presence.Party.Size++;
presence.Secrets.JoinSecret = args.Secret;
MessageBox.Show("OnJoin: " + args.Secret);
_control.StopRadio();
_control.RefreshSource(true);
Utils.SaveSetting("spyserver.uri", args.Secret);
_control.StartRadio();
}