asp.net的XML通用操作类

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Xml;
/// <summary>
///Xml 的摘要说明
/// </summary>
public class Xml
{
    public Xml()
    {
        //
        //TODO: 在此处添加构造函数逻辑
        //
    }
    /// <summary>
    /// XML资源类型
    /// </summary>
    public enum XmlType
    {
        File,
        String
    };
    #region 读取XML资源到DataSet中
    /// <summary>
    /// 读取XML资源到DataSet中
    /// </summary>
    /// <param name="source">XML资源，文件为路径，否则为XML字符串</param>
    /// <param name="xmlType">XML资源类型</param>
    /// <returns>DataSet</returns>
    public static DataSet GetDataSet(string source, XmlType xmlType)
    {
        DataSet ds = new DataSet();
        if (xmlType == XmlType.File)
        {
            ds.ReadXml(source);
        }
        else
        {
            XmlDocument xd = new XmlDocument();
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