读取xml节点内容

//一种写法
Regex expression = new Regex("<Content>(.*)</Content>", RegexOptions.None);
var content = expression.Matches(xml)[0].Groups[2].Value;

//二种写法 xml解析
XmlDocument document = new XmlDocument();
document.LoadXml("<?xml version=\"1.0\" encoding=\"GB2312\"?>" + xml);
content = document.GetElementsByTagName("Content")[0].InnerXml;//要查询的的节点名