xml节点含<![CDATA[]]>数据读取

<?xml version="1.0" encoding="GBK"?>
<Document>
<ChiefComplaint>
<![CDATA[右眼视力进行性下降2年余]]>
</ChiefComplaint>
</Document>

private int ReadXml()
{
string responseInfo = "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"
+ @"<Document>
<ChiefComplaint>
<![CDATA[右眼视力进行性下降2年余]]>
</ChiefComplaint>
</Document>";

XmlDocument doc = new XmlDocument();
doc.LoadXml(responseInfo);
string xpathChiefComplaint = "/Document/ChiefComplaint";

XmlNode xnChiefComplaint = doc.SelectSingleNode(xpathChiefComplaint);

string nodeValue = xnChiefComplaint.InnerText;
}