LightVisualElement lve = new LightVisualElement();
 public RadForm1()
 {
     InitializeComponent(); 

     this.radPageViewPage1.Title = "test";
     this.radNavigationView1.NavigationViewElement.HeaderElement.DrawText = false;
     this.radNavigationView1.NavigationViewElement.HeaderElement.Children.Add(lve);
     this.radNavigationView1.SelectedPageChanged += RadNavigationView1_SelectedPageChanged;
 }

 private void RadNavigationView1_SelectedPageChanged(object sender, EventArgs e)
 {
     lve.Text = this.radNavigationView1.SelectedPage.Title;
 }