public void OnPivotNavigatedTo(PivotNavigationContext context)
 {
     _pivotController = context.PivotController;
 }
        private void PivotNavigateToViewModel(PivotItem pivotItem)
        {
            var viewModel = pivotItem.DataContext as IPivotNavigationAware;
            if (viewModel != null)
            {
                var parameter = new PivotNavigationContext();
                parameter.PivotController = _pivotContainerViewModel.PivotController;

                viewModel.OnPivotNavigatedTo(parameter);
            }
        }