private void NewFeatures_Loaded(object sender, RoutedEventArgs e)
        {
            this.mainViewModel = MainViewModel.GetSingleInstance();

            this.mainViewModel.VisualStudioNewFeaturesData();
            this.DataContext = mainViewModel;
        }
        public static MainViewModel GetSingleInstance()
        {

            if (currentInstance == null)
            {
                currentInstance = new MainViewModel();
            }
            return currentInstance;
        }
 private void ChangedOldControl_Loaded(object sender, RoutedEventArgs e)
 {
     this.mainViewModel = MainViewModel.GetSingleInstance();
     this.DataContext = mainViewModel;
     this.mainViewModel.VisualStudioChangedOldFeturesData();
 }
 private void RegisterPage_Loaded(object sender, RoutedEventArgs e)
 {
     this.mainViewModel = MainViewModel.GetSingleInstance();
     this.DataContext = mainViewModel;
 }