private async void ModifyItem_Click(object sender, RoutedEventArgs e)
{
var item = (sender as MenuFlyoutItem).Tag as FolderItem;
var dialog = new FolderDialog(item);
await dialog.ShowAsync();
}
private async void AddFolderButton_Click(object sender, RoutedEventArgs e)
{
var dialog = new FolderDialog();
await dialog.ShowAsync();
}
