当前上下文中不存在名称'xDocument'

Question

当为RSS提要阅读器编写一些代码时，我得到一个错误"名称'xDocument'不存在于当前上下文中"。xDocument这里有什么问题?
下面是我的代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml.Linq;
namespace RSSreaderAPP
{
    public partial class _Default : Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                ReadRss();
            }
        }
        private void ReadRss()
        {
            string RssFeedUrl = "http://feeds.feedburner.com/neowin-main";
            List<Feeds> feeds = new List<Feeds>();
            try
            {
                XDocument xDoc = new XDocument();
                xDoc = xDocument.Load(RssFeedUrl);
                var items = (from x in xDoc.Descendants("item")
                             select new
                             {
                                 title = x.Element("title").Value,
                                 link = x.Element("link").Value,
                                 pubDate = x.Element("publish date").Value,
                                 description = x.Element("description").Value
                             });
                if (items != null)
                {
                    foreach (var i in items)
                    {
                        Feeds f = new Feeds
                        {
                            Title = i.title,
                            Link = i.link,
                            PublishDate = i.pubDate,
                            Description = i.description
                        };
                        feeds.Add(f);
                    }
                }
                gridViewRSS.DataSource = feeds;
                gridViewRSS.DataBind();
            }
            catch (Exception ex)
            {
                throw;
            }
        }
    }
}

Answer 1

我改变了

XDocument xDoc = new XDocument();
xDoc = xDocument.Load(RssFeedUrl);

XDocument xDoc = XDocument.Load(RssFeedUrl);

和pubDate = x.Element("publish date").Value

pubDate = x.Element("pubDate").Value,
private void ReadRss()
{
    string RssFeedUrl = "http://feeds.feedburner.com/neowin-main";
    List<Feeds> feeds = new List<Feeds>();
    try
    {
        //XDocument xDoc = new XDocument();
        //xDoc = xDocument.Load(RssFeedUrl);
        XDocument xDoc = XDocument.Load(RssFeedUrl);
        var items = (from x in xDoc.Descendants("item")
                     select new
                     {
                         title = x.Element("title").Value,
                         link = x.Element("link").Value,
                         pubDate = x.Element("pubDate").Value,
                         description = x.Element("description").Value,
                     });
        if (items != null)
        {
            foreach (var i in items)
            {
                Feeds f = new Feeds
                {
                    Title = i.title,
                    Link = i.link,
                    PublishDate = i.pubDate,
                    Description = i.description,
                };
                feeds.Add(f);
            }
        }
        gridViewRSS.DataSource = feeds;
        gridViewRSS.DataBind();
    }
    catch (Exception ex)
    {
        throw;
    }
}