public void OnNavigatedTo(NavigationEventArgs e)
{
var frameState = SuspensionManager.SessionStateForFrame(this.Frame);
this._pageKey = "Page-" + this.Frame.BackStackDepth;
//if (e.NavigationMode == NavigationMode.New)
//{
// // Clear existing state for forward navigation when adding a new page to the
// // navigation stack
// var nextPageKey = this._pageKey;
// int nextPageIndex = this.Frame.BackStackDepth;
// while (frameState.Remove(nextPageKey))
// {
// nextPageIndex++;
// nextPageKey = "Page-" + nextPageIndex;
// }
// // Pass the navigation parameter to the new page
// if (this.LoadState != null)
// {
// this.LoadState(this, new LoadStateEventArgs(e.Parameter, null));
// }
//}
//else
//{
// // Pass the navigation parameter and preserved page state to the page, using
// // the same strategy for loading suspended state and recreating pages discarded
// // from cache
// if (this.LoadState != null)
// {
// this.LoadState(this, new LoadStateEventArgs(e.Parameter, (Dictionary<String, Object>)frameState[this._pageKey]));
// }
//}
}