public void LoadMain()
        {
            List <string> areaImageUrlList = SL.AreaList.Select(a => a.areaDefaultImageURL).ToList();

            FileCachingService.PreloadImagesToDiskFromUrl(areaImageUrlList);

            ((IntroContainerViewModel)ViewModel).NavigateToMainView.Execute();
            //UIStoryboard board = UIStoryboard.FromName("Main", null);
            //UIViewController ctrl = (UIViewController)board.InstantiateViewController("MainViewController");
            //this.PresentViewController(ctrl, false, null);
        }
        void Traverse()
        {
            try
            {
                AreasViewController areas = pageViewController.ViewControllers[0] as AreasViewController;
                if (areas != null && SL.HasAreas)
                {
                    SL.Profile.SetDefaultAreaIfNeeded();

                    List <string> areaImageUrlList = SL.AreaList.Select(a => a.areaDefaultImageURL).ToList();
                    FileCachingService.PreloadImagesToDiskFromUrl(areaImageUrlList);

                    LoadMain();
                }
                else
                {
                    NextPage();
                }
            }
            catch (Exception)
            {
            }
        }