private void Work_Click(object sender, RoutedEventArgs e)
        {
            RegistrationFormPage rgstrtnfrmPG = new RegistrationFormPage();

            workframeNM.NavigationService.Navigate(rgstrtnfrmPG);
            String onprcssdflt = "Enrollment Form";

            onprocessNM.SetValue(TextBlock.TextProperty, onprcssdflt);
            onprocessNM.SetValue(ContentControl.ContentProperty, onprcssdflt);
        }
        private void DisplayEnrollmentForm()
        {
            RegistrationFormPage rgstrtnfrmPG = new RegistrationFormPage();

            workframeNM.NavigationService.Navigate(rgstrtnfrmPG);
        }