Unity3D读取XML文件里面的属性

<?xml version="1.0"?>
<info>
    <book id="b1" lang="en">
        <name>c++</name>
        <price>570</price>
    </book>
    <book id="b2" lang="en">
        <name>c#</name>
        <price>110</price>
    </book>
</info>

using Mono.Xml;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Security;
using System.Xml;
using UnityEngine;
public class ReadXML : MonoBehaviour ｛
    // Use this for initialization
    void Start () ｛
        //TextAsset ta = Resources.Load("test", typeof(TextAsset)) as TextAsset;
        //ReadXMlTest(new MemoryStream(ta.bytes));
        StartCoroutine(StartTxt());
    ｝
    // Update is called once per frame
    void Update () ｛
    ｝
    IEnumerator StartTxt()
    ｛
        WWW www = new WWW("file://" + Application.streamingAssetsPath + "/test.xml");
        yield return www;
        //ReadXMlTest(new MemoryStream(www.bytes));
        ReadXMLMono(www.text);
        www.Dispose();
    ｝
    void ReadXMlTest(Stream stream)
    ｛
        XmlDocument xmldoc = new XmlDocument();
        xmldoc.Load(stream);
        XmlNode info = xmldoc.SelectSingleNode("info");
        foreach (XmlNode node in info.ChildNodes)
        ｛
            string id = node.Attributes["id"].Value;
            string lang = node.Attributes["lang"].Value;
            string name = node.SelectSingleNode("name").InnerText;
            string price = node.SelectSingleNode("price").InnerText;
            Debug.Log("node.Name:" + node.Name + " id:"+ id + " lang:" + lang + " name:" + name + " price:" + price);
        ｝
    ｝
    void ReadXMLMono(string text)
    ｛
        SecurityParser sp = new SecurityParser();
        sp.LoadXml(text);
        SecurityElement se = sp.ToXml();
        foreach (SecurityElement sel in se.Children)
        ｛
            string id = (string)sel.Attributes["id"];
            string lang = (string)sel.Attributes["lang"];
            string name = "", price = "";
            foreach (SecurityElement se2 in sel.Children)
            ｛
                if (se2.Tag == "name")
                ｛
                    name = se2.Text;
                ｝
                else if (se2.Tag == "price")
                ｛
                    price = se2.Text;
                ｝
            ｝
            Debug.Log(" id:" + id + " lang:" + lang + " name:" + name + " price:" + price);
        ｝
    ｝
｝