尝试

  xElement.Element（的ElementName）.ReplaceNodes（新XCData（值））;
 

This is when using XDocument from .net.

I thought this might work...

xElement.Element(elementName).Value = new XCData(value).ToString();

... but it comes out like this...

<name>&lt;![CDATA[hello world]]&gt;</name>

Try

xElement.Element(elementName).ReplaceNodes(new XCData(value));