protected BaseViewModelPage()
{
_navigationHelper = new NavigationHelper(this);
_navigationHelper.LoadState += navigationHelper_LoadState;
_navigationHelper.SaveState += navigationHelper_SaveState;
NavigationCacheMode = NavigationCacheMode.Required;
}
public ItemPage()
{
this.InitializeComponent();
this.navigationHelper = new NavigationHelper(this);
this.navigationHelper.LoadState += this.NavigationHelper_LoadState;
}