/// <summary>
        /// This is the click handler for the 'Scenario1BtnDefault' button.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Scenario1BtnDefault_Click(object sender, RoutedEventArgs e)
        {
            String rss = scenario1RssInput.Text;
            if (null != rss && "" != rss)
            {
                try
                {
                    String xml;
                    var doc = new Windows.Data.Xml.Dom.XmlDocument();
                    scenario1OriginalData.Document.GetText(Windows.UI.Text.TextGetOptions.None, out xml);
                    doc.LoadXml(xml);

                    // create a rss CDataSection and insert into DOM tree
                    var cdata = doc.CreateCDataSection(rss);
                    var element = doc.GetElementsByTagName("content").Item(0);
                    element.AppendChild(cdata);

                    Scenario.RichEditBoxSetMsg(scenario1Result, doc.GetXml(), true);
                }
                catch (Exception exp)
                {
                    Scenario.RichEditBoxSetError(scenario1Result, exp.Message);
                }
            }
            else
            {
                Scenario.RichEditBoxSetError(scenario1Result, "Please type in RSS content in the [RSS Content] box firstly.");
            }
        }
        /// <summary>
        /// This is the click handler for the 'Scenario1BtnDefault' button.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Scenario1BtnDefault_Click(object sender, RoutedEventArgs e)
        {
            String rss = scenario1RssInput.Text;

            if (null != rss && "" != rss)
            {
                try
                {
                    String xml;
                    var    doc = new Windows.Data.Xml.Dom.XmlDocument();
                    scenario1OriginalData.Document.GetText(Windows.UI.Text.TextGetOptions.None, out xml);
                    doc.LoadXml(xml);

                    // create a rss CDataSection and insert into DOM tree
                    var cdata   = doc.CreateCDataSection(rss);
                    var element = doc.GetElementsByTagName("content").Item(0);
                    element.AppendChild(cdata);

                    Scenario.RichEditBoxSetMsg(scenario1Result, doc.GetXml(), true);
                }
                catch (Exception exp)
                {
                    Scenario.RichEditBoxSetError(scenario1Result, exp.Message);
                }
            }
            else
            {
                Scenario.RichEditBoxSetError(scenario1Result, "Please type in RSS content in the [RSS Content] box firstly.");
            }
        }