private void btnRate_Click(object sender, RoutedEventArgs e)
{
var task = new MarketplaceReviewTask();
task.Show();
}
private void btn_Tap(object sender, System.Windows.Input.GestureEventArgs e)
{
MarketplaceReviewTask marketplaceReviewTask = new MarketplaceReviewTask();
marketplaceReviewTask.Show();
}