c# 写入Xml 元素（<![CDATA[ ]]>）

一般处理程序代码：
 XmlDocument xmldoc = new XmlDocument();
            xmldoc.AppendChild(xmldoc.CreateXmlDeclaration("1.0", "UTF-8", null));
            XmlElement firstElement = xmldoc.CreateElement("", "data", "");
            xmldoc.AppendChild(firstElement);
            using (GSParkEntities db = new GSParkEntities())
            {
                DateTime date=Convert.ToDateTime( DateTime.Now.ToString("yyyy-MM-dd"));
                IList<Meeting> list = db.Meeting.Where(o => o.MeetDate >= date).OrderBy(o=>o.MeetDate).ToList();
                firstElement.SetAttribute("count", list.Count + "");
                foreach (Meeting xMeeting in list)
                {
                    XmlElement secondElement = xmldoc.CreateElement("item");
                    //secondElement.SetAttribute("MeetDate",(xMeeting.MeetDate).ToString("yyyy-MM-dd"));
                    //secondElement.SetAttribute("MeetTilte", xMeeting.MeetTitle + "");
                    //secondElement.SetAttribute("Speaker", xMeeting.Speaker);
                    //secondElement.SetAttribute("MeetTime", (xMeeting.MeetDate).ToString("hh:mm"));
                    //secondElement.SetAttribute("MeetPlace", xMeeting.MeetPlace);
                    XmlElement meetDate = xmldoc.CreateElement("meetDate");
                    meetDate.InnerText = (xMeeting.MeetDate).ToString("yyyy-MM-dd");
                    secondElement.AppendChild(meetDate);

                    //XmlElement meetTitle = xmldoc.CreateElement("meetTitle");
                    //meetTitle.InnerText = "<![CDATA[" + xMeeting.MeetTitle + "]]>";
                    //secondElement.AppendChild(meetTitle);
                    XmlElement meetTitle = xmldoc.CreateElement("meetTitle");
                    XmlCDataSection cd = xmldoc.CreateCDataSection(xMeeting.MeetTitle);
                    meetTitle.AppendChild(cd);
                    secondElement.AppendChild(meetTitle);

                    //XmlElement speaker = xmldoc.CreateElement("speaker");
                    //speaker.InnerText = "<![CDATA[" + xMeeting.Speaker + "]]>";
                    //secondElement.AppendChild(speaker);
                    XmlElement speaker = xmldoc.CreateElement("speaker");
                    XmlCDataSection cd1 = xmldoc.CreateCDataSection(xMeeting.Speaker);
                    speaker.AppendChild(cd1);
                    secondElement.AppendChild(speaker);

                    XmlElement meetTime = xmldoc.CreateElement("meetTime");
                    meetTime.InnerText = (xMeeting.MeetDate).ToString("HH:mm");
                    secondElement.AppendChild(meetTime);

                    //XmlElement meetPlace = xmldoc.CreateElement("meetPlace");
                    //meetPlace.InnerText = "<![CDATA[" + xMeeting.MeetPlace + "]]>";
                    //secondElement.AppendChild(meetPlace);
                    XmlElement meetPlace = xmldoc.CreateElement("meetPlace");
                    XmlCDataSection cd2 = xmldoc.CreateCDataSection(xMeeting.MeetPlace);
                    meetPlace.AppendChild(cd2);
                    secondElement.AppendChild(meetPlace);
 

                    firstElement.AppendChild(secondElement);
                }
                
            }
           xmldoc.Save(context.Response.Output);