public MainPage() {
this.InitializeComponent();
_navigationHelper = new NavigationHelper(this);
_navigationHelper.LoadState += navigationHelper_LoadState;
_navigationHelper.SaveState += navigationHelper_SaveState;
}
public ProfilePage() {
InitializeComponent();
navigationHelper = new NavigationHelper(this);
navigationHelper.LoadState += navigationHelper_LoadState;
navigationHelper.SaveState += navigationHelper_SaveState;
}