private void AddButton_OnClick(object sender, RoutedEventArgs e)
        {
            var tabViewModel = new TabViewModel();

            Tabs.Add(tabViewModel);
            tabViewModel.IsSelected = true;
        }
        public WeixinApiDebuger()
        {
            InitializeComponent();
            DataContext = this;
            Tabs        = new ObservableCollection <TabViewModel>();
            var info = new TabViewModel();

            Tabs.Add(info);
            info.IsSelected = true;
        }