private void adView_ReceivedThirdPartyRequest(object sender, MASTAdView.ThirdPartyRequestEventArgs e)
        {
            string entry = "adView_ReceivedThirdPartyRequest Properties:" + App.FormattedString(e.Properties) +
                           " Parameters:" + App.FormattedString(e.Parameters);

            addEntry(entry);
        }
 async private void adView_ReceivedThirdPartyRequest(object sender, MASTAdView.ThirdPartyRequestEventArgs e)
 {
     // Since these events can come from a non-main/UI thread, dispatch properly.
     await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, delegate()
     {
         textBlock.Text += "Properties:" + App.FormattedString(e.Properties) +
                           " Parameters:" + App.FormattedString(e.Parameters) + "\n\n";
     });
 }