public MainVM()
{
model = new Model();
PageContainer.SetModel(model);
CurrentPage = PageContainer.GetPageByType(PageType.ListItems);
PageContainer.CurrentPageChanged += PageContainer_CurrentPageChanged;
model.Load();
Application.Current.Exit += (o, e) => model.Save();
}
private void PageContainer_CurrentPageChanged(object sender, PageType e)
{
CurrentPage = PageContainer.GetPageByType(e);
NotifyPropertyChanged("CurrentPage");
}