C#读取XML

    /*本地xml  转化为stream读取*/          
    string path=HttpContext.Current.Server.MapPath(@".\AdminConfig.xml");          
    Stream stream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);

    XmlTextReader reader = new XmlTextReader(stream);
    XmlDocument xd = new XmlDocument();
    xd.Load(reader);

    /*URL格式XML，转化为stream读取*/
    string url = SPContext.Current.Site.Url + @"/gasScripts/AdminConfig.xml";
    HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);  
    HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
    Stream stream = myHttpWebResponse.GetResponseStream();

    XmlTextReader reader = new XmlTextReader(stream);
    XmlDocument xd = new XmlDocument();
    xd.Load(reader); 

     /*URL格式XML，直接读取URL*/

     string url =@"http://***/gasScripts/webconfig.xml";
     XmlTextReader reader = new XmlTextReader(url);
     XmlDocument xd = new XmlDocument();
     xd.Load(reader);
     XmlNode node = xd.SelectSingleNode("/appSettings/add[@key='dingwen']");
     Console.Write(node.Attributes["value"].Value);