.net XmlHelper xml帮助类

using System.Data;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

    /// <summary>
    /// XML 操作基类
    /// </summary>
    public static class XmlHelper
    {
        /// <summary>
        /// 将xml转为Datable
        /// </summary>
        /// <param name="xmlStr"></param>
        /// <returns></returns>
        public static DataTable Xml2DataTable(string xmlStr)
        {
            if (!string.IsNullOrEmpty(xmlStr))
            {
                StringReader StrStream = null;
                XmlTextReader Xmlrdr = null;
                try
                {
                    DataSet ds = new DataSet();
                    //读取字符串中的信息
                    StrStream = new StringReader(xmlStr);
                    //获取StrStream中的数据
                    Xmlrdr = new XmlTextReader(StrStream);
                    //ds获取Xmlrdr中的数据
                    ds.ReadXml(Xmlrdr);
                    return ds.Tables[];
                }
                catch (Exception e)
                {
                    return null;
                }
                finally
                {
                    //释放资源
                    if (Xmlrdr != null)
                    {
                        Xmlrdr.Close();
                        StrStream.Close();
                        StrStream.Dispose();
                    }
                }
            }
            return null;
        }

        /// <summary>
        /// 将xml转为JSON
        /// </summary>
        /// <param name="xmlStr"></param>
        /// <returns></returns>
        public static string Xml2Json(string xmlStr)
        {
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(xmlStr);
            string jsonText = JsonConvert.SerializeXmlNode(doc);
            return jsonText;
        }

        #region 反序列化
        /// <summary>
        /// 反序列化
        /// </summary>
        /// <param name="type">类型</param>
        /// <param name="xml">XML字符串</param>
        /// <returns></returns>
        public static object DESerialize(Type type, string xml)
        {
            using (StringReader sr = new StringReader(xml))
            {
                XmlSerializer xmldes = new XmlSerializer(type);
                return xmldes.Deserialize(sr);
            }
        }
        /// <summary>
        /// 反序列化
        /// </summary>
        /// <param name="type"></param>
        /// <param name="xml"></param>
        /// <returns></returns>
        public static object DESerialize(Type type, Stream stream)
        {
            XmlSerializer xmldes = new XmlSerializer(type);
            return xmldes.Deserialize(stream);
        }
        #endregion

        #region 序列化
        /// <summary>
        /// 序列化
        /// </summary>
        /// <param name="type">类型</param>
        /// <param name="obj">对象</param>
        /// <returns></returns>
        public static string XmlSerialize(Type type, object obj)
        {
            MemoryStream Stream = new MemoryStream();
            XmlSerializer xml = new XmlSerializer(type);
            //序列化对象
            xml.Serialize(Stream, obj);
            Stream.Position = ;
            StreamReader sr = new StreamReader(Stream);
            string str = sr.ReadToEnd();

            sr.Dispose();
            Stream.Dispose();

            return str;
        }
        #endregion 序列化
    }