http://msdn.microsoft.com/zh-cn/magazine/cc507634.aspx
C# 读取xml文件
<?xml version="1.0" encoding="utf-8" ?>
<a>
<a b="c" />
</a>
using System.xml;
string datafile = "a.xml";
XmlDocument doc = new XmlDocument();
doc.Load("About.xml");
XmlNode root = doc.DocumentElement;//获取根节点
root.SelectSingleNode("a/@b").Value; //获取属性为b的值