private void BtnPatient_Click(object sender, RoutedEventArgs e)
        {
            ViewModelPatientList vm  = new ViewModelPatientList();
            PagePatientList      ppl = new PagePatientList(vm);

            ContentFrame.Navigate(ppl);
        }
        private void BtnSave_Click(object sender, RoutedEventArgs e)
        {
            Patient patient = new Patient();

            patient.FirstName     = TBFirstName.Text;
            patient.LastName      = TBLastName.Text;
            patient.PatientNumber = TBPatientNumber.Text;
            patient.PostPatient(patient);
            ViewModelPatientList vm  = new ViewModelPatientList();
            PagePatientList      ppl = new PagePatientList(vm);

            NavigationService.Navigate(ppl);
        }
        private void BtnCancel_Click(object sender, RoutedEventArgs e)
        {
            ViewModelPatientList vm     = new ViewModelPatientList();
            PagePatientList      ppl    = new PagePatientList(vm);
            Frame            pageFrame  = null;
            DependencyObject currParent = VisualTreeHelper.GetParent(this);

            while (currParent != null && pageFrame == null)
            {
                pageFrame  = currParent as Frame;
                currParent = VisualTreeHelper.GetParent(currParent);
            }
            pageFrame.Navigate(ppl);
        }
        private void TBArchive_Checked(object sender, RoutedEventArgs e)
        {
            DependencyObject dep = (DependencyObject)e.OriginalSource;

            while ((dep != null) && !(dep is ListViewItem))
            {
                dep = VisualTreeHelper.GetParent(dep);
            }
            if (dep == null)
            {
                return;
            }

            Patient patient = (Patient)LVPatients.ItemContainerGenerator.ItemFromContainer(dep);

            patient.SetArchived(patient);
            ViewModelPatientList vm  = new ViewModelPatientList();
            PagePatientList      ppl = new PagePatientList(vm);

            NavigationService.Navigate(ppl);
        }