private static void OpenWebcast(Webcast webcast)
        {
            FeatureTrackingManager.Instance.UseFeature(
                Features.Web_AddToLibrary,
                "KEY", webcast.key
                );

            WebsiteAccess.OpenOffsiteUrl(webcast.url);
        }
 void ButtonHelp_Click(object sender, RoutedEventArgs e)
 {
     WebsiteAccess.OpenOffsiteUrl(WebsiteAccess.Url_CSLManual);
 }