Linqtoxml修改CDATA节点值

xop.Document.Element("messages").Add(                        new XElement("message",                            new XAttribute("event", model.EventType),                            new XElement("subject", model.Subject),                            new XElement("body", new XCData(model.Body))));

element.SetElementValue("body", new XCData(model.Body));

element.Element("body").ReplaceWith(new XElement("body", new XCData(model.Body)));