使用LINQ读取RSS，比传统的C#2.0方法节省了很多代码

        private List<RssNews> GetNews()        {            List<RssNews> list = new List<RssNews>();            //http://services.community.microsoft.com/feeds/feed/CSharpHeadlines            string rss = ConfigurationManager.AppSettings["NewsFeed"];            if (!string.IsNullOrWhiteSpace(rss))            {                try                {                    var feed = XDocument.Load(rss, LoadOptions.PreserveWhitespace);                    var items = from item in feed.Root.Element("channel").Elements("item").Take(5)                                select new RssNews()                                {                                    title = item.Element("title").Value,                                    link = item.Element("link").Value.ToSEOLink(),                                    description = item.Element("description").Value,                                    pubDate = item.Element("pubDate").Value                                };                    list = items.ToList();                }                catch { }            }            return list;        }