public ObervHandler()
        {
            xmlWriter = new XMLWriter();
            setup = new UPnP_Setup();

            subscribe();
            setup.StartSinkDisco();
            setup.StartSourceDisco();
        }
        public MainWindow()
        {
            setup = new UPnP_Setup();

            InitializeComponent();

            subscribe();
            setup.StartSinkDisco();
            setup.StartSourceDisco();

            //btnSubscribe.IsEnabled = false;
        }