private void rbBike_Checked(object sender, RoutedEventArgs e)
        {
            Tombstoning.Save("tbNumberOfZonesSelected", tbNumberOfZonesSelected.Text);

            tempLastNumberOfZones        = tbNumberOfZonesSelected.Text;
            tbNumberOfZonesSelected.Text = "";

            Tombstoning.Save("txtStartingPoint", txtStartingPoint.Text);
            txtStartingPoint.Text = "";

            Tombstoning.Save("chkExtraBikeChecked", chkExtraBike.IsChecked.ToString());
            Tombstoning.Save("chkExtraExtraChecked", chkExtraExtra.IsChecked.ToString());


            chkExtraBike.IsEnabled  = false;
            chkExtraExtra.IsEnabled = false;
            chkExtraBike.IsChecked  = false;
            chkExtraExtra.IsChecked = false;

            btnMinus.IsEnabled = false;
            btnPlus.IsEnabled  = false;

            txtStartingPoint.IsEnabled = false;

            btnCreateMessage.IsEnabled = true;
        }
        protected override void OnNavigatedFrom(System.Windows.Navigation.NavigationEventArgs e)
        {
            //Billet
            Tombstoning.Save("StartingPoint", this.txtStartingPoint.Text);

            Tombstoning.Save("tbNumberOfZonesSelected", this.tbNumberOfZonesSelected.Text);
            Tombstoning.Save("rbAdult", this.rbAdult.IsChecked.ToString());
            Tombstoning.Save("rbChild", this.rbChild.IsChecked.ToString());
            Tombstoning.Save("rbBike", this.rbBike.IsChecked.ToString());
            Tombstoning.Save("chkExtraBike", this.chkExtraBike.IsChecked.ToString());
            Tombstoning.Save("chkExtraExtra", this.chkExtraExtra.IsChecked.ToString());

            //Klippekort panorama item
            Tombstoning.Save("txtStartingPointKlippeKort", this.txtStartingPointKlippeKort.Text);
            Tombstoning.Save("tbNumberOfZonesSelectedKlippeKort", this.tbNumberOfZonesSelectedKlippeKort.Text);
            Tombstoning.Save("rbAdultKlippeKort", this.rbAdultKlippeKort.IsChecked.ToString());
            Tombstoning.Save("rbChildKlippeKort", this.rbChildKlippeKort.IsChecked.ToString());
            Tombstoning.Save("btnCreateMessageKlippeKort", this.btnCreateMessageKlippeKort.IsEnabled.ToString());

            //Pivot item
            Tombstoning.Save("pivotControlSelectedItem", this.pivotControl.SelectedIndex);
        }