读取远程xml并写入到datatable

 XmlDataDocument xmlDoc = new XmlDataDocument();

    DataSet myDataSet = xmlDoc.DataSet;

    xmlDoc.DataSet.ReadXml("http://news.qq.com/newsgn/rss_newsgn.xml");

    XmlNode root = xmlDoc.FirstChild;

    DataTable dt = xmlDoc.DataSet.Tables["Item"];