void NextButtonOnClick(object sender, RoutedEventArgs args)
        {
            vitals.FavoriteOS = txtboxFavoriteOS.Text;      //���������� �Է������� �����ڷ� ����
            vitals.Directory = txtboxFavoriteDir.Text;

            if (NavigationService.CanGoForward)
                NavigationService.GoForward();
            else
            {
                WizardPage3 page = new WizardPage3(vitals);
                NavigationService.Navigate(page);
            }
        }
 void NextButtonOnClick(object sender, RoutedEventArgs e)
 {
     vitals.FavoriteOS = txtboxFavoriteOS.Text;
     vitals.Directory  = txtboxFavoriteDir.Text;
     if (NavigationService.CanGoForward)
     {
         NavigationService.GoForward();
     }
     else
     {
         WizardPage3 page = new WizardPage3(vitals);
         NavigationService.Navigate(page);
     }
 }