XML 转换 DataSet 遇到了问题，坐等指点。。。。
<DATA> 
  <User>
    <Name>a</Name>
    <City>beijing</City>
    <Email>aass@22.net</Email>
    <Major>
      <majorID>1</majorID>
      <majorName>ssdf</majorName>
    </Major>
  </User>
  <User>
    <Name>b</Name>
    <City>shanghai</City>
    <Email>ssdfs@22.net</Email>
    <Major>
      <majorID>2</majorID>
      <majorName>xxdf</majorName>
    </Major>
  </User>
  <User>
    <Name>c</Name>
    <City>nanjing</City>
    <Email>sdss@22.net</Email>
    <Major></Major>
  </User>
</DATA> 


当使用如下代码进行转换后，不知道该如何获取Major 嵌套的记录了：

        public static DataSet ConstructResultDS(string strCSOSDataXML)
        {
            DataSet dsCSOSData = new DataSet();

            StringReader srStream = new StringReader(strCSOSDataXML);
            XmlTextReader xtrReader = new XmlTextReader(srStream);
            try
            {
                dsCSOSData.ReadXml(xtrReader);
                return dsCSOSData;
            }
            catch (Exception ex)
            {
                string strTest = ex.Message;
                return null;
            }
            finally
            {
                if (xtrReader != null)
                    xtrReader.Close();
            }
        }


------解决方案--------------------
dsCSOSData["Major"]就是Major的信息 
dsCSOSData["User"]就是User的信息&nb