WriteXml类(C#)

using System;
using System.Web;
using System.Data;
using System.Text;
using System.Xml;
using System.IO;
namespace Baolee.GeneralMethod
{
 /// <summary>
 /// WriteXml 的摘要说明。
 /// </summary>
 public class WriteXml
 {
  /// <summary>
  /// 构造函数
  /// </summary>
  public WriteXml()
  {
   //
   // TODO: 在此处添加构造函数逻辑
   //
  }
  /// <summary>
  /// 读取XML和XSD, 两文件同名如果两文件不同名，则参看LoadSignXML
  /// </summary>
  /// <param name="descDirectory"></param>
  /// <param name="fileName">文件名，不带扩展名</param>
  /// <returns></returns>
  public DataSet Load(string descDirectory, string fileName)
  {
   DataSet set = new DataSet();
   set.ReadXmlSchema(descDirectory + @"\" + fileName + ".xsd");
   set.ReadXml(descDirectory + @"\" + fileName + ".xml");
   return set;
  }
  /// <summary>
  /// 读取单一XML文件
  /// </summary>
  /// <param name="descDirectory"></param>
  /// <param name="fileName"></param>
  /// <returns></returns>
  public DataSet LoadSignXML(string descDirectory, string fileName)
  {
   XmlDataDocument document = new XmlDataDocument();
   document.DataSet.ReadXml(descDirectory + @"\" + fileName + ".xml");
   return document.DataSet;
  }
  /// <summary>
  /// 读取XML和XSD, 两文件不同名
  /// </summary>
  /// <param name="descDirectory"></param>
  /// <param name="xmlName"></param>
  /// <param name="xsdName"></param>
  /// <returns></returns>
  public DataSet LoadSignXML(string descDirectory, string xmlName, string