一个名为test.xml文件如下：

<?xml version="1.0" encoding="utf-8" ?>
<Propertys Name ="myName">
       <Data Value="11"/>
       <Data Value="22"/>
       <Data Value="33"/>
</Propertys>

以下是读取代码：
using System.Xml.Linq;
using System.Xml;
using System.Text;

StringBuilder sb = new StringBuilder();
string[] PropertyValue;
XmlDocument xml = new XmlDocument();
xml.Load(Server.MapPath("test.xml"));
XmlNodeList xn = xml.SelectNodes("Propertys/Data");
foreach (XmlNode xn1 in xn)
{
      sb.Append(xn1.Attributes["Value"].Value+",");
}
PropertyValue = sb.ToString().TrimEnd(',').Split(',');
foreach (string s in PropertyValue)
{
     Response.Write(s+"</br>");
}

运行结果为：

11
22
33