protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
if (e.NavigationMode == NavigationMode.New && e.Uri.ToString() == "/BaconographyWP8Core;component/MainPage.xaml" && e.IsCancelable)
{
OnNavigatedTo(null);
e.Cancel = true;
}
_viewModelContextService.PopViewModelContext(DataContext as ViewModelBase);
}