Extracting Twitter Posts and Twitter Mentions

    public class Twitter
    {
        private static XDocument xDoc = null;
 
        public Int32 TweetCount { get; set; }
        public String TwitterProfileName { get; set; }
 
        public List<Tweet> Tweets
        {
            get
            {
                XDocument xml = LoadTweetXML(false);
 
                if (xml == null)
                    throw new Exception(String.Format("Failed to get tweets from {0}", TwitterProfileName));
 
                var query = from e in xml.Descendants("item")
                            select new Tweet
                            {
                                Id = e.Element("guid").Value,
                                Title = e.Element("title").Value
                                        .Replace(String.Format("{0}: ", TwitterProfileName), String.Empty),
                                Link = e.Element("link").Value,
                                Content = e.Element("description").Value,
                                Published = Convert.ToDateTime((e.Descendants("pubDate").First().Value)),
                            };
 
                return query.ToList();
            }
        }
 
        public List<Tweet> TweetMentions
        {
            get
            {
                XDocument xml = LoadTweetXML(true);
 
                if (xml == null)
                    throw new Exception(String.Format("Failed to get tweets mentions from {0}", TwitterProfileName));
 
                XNamespace ns = "http://www.w3.org/2005/Atom";
 
                var query = from item in xml.Descendants(ns + "entry").Take(TweetCount)
                            select new Tweet
                            {
                                Id = item.Element(ns + "id").Value,
                                Published = DateTime.Parse(item.Element(ns + "published").Value),
                                Title = item.Element(ns + "title").Value,
                                Content = item.Element(ns + "content").Value,
                                Link = (from XElement x in item.Descendants(ns + "link")
                                        where x.Attribute("type").Value == "text/html"
                                        select x.Attribute("href").Value).First(),
                                Image = (from XElement x in item.Descendants(ns + "link")
                                         where x.Attribute("type").Value == "image/png"
                                         select x.Attribute("href").Value).First(),
                                Author = new Author()
                                {
                                    Name = item.Element(ns + "author").Element(ns + "name").Value,
                                    Uri = item.Element(ns + "author").Element(ns + "uri").Value
                                }
                            };
 
                return query.ToList();
            }
        }
 
        public Twitter(string screenName, int numTweets = 10)
        {
            TwitterProfileName = screenName;
            TweetCount = numTweets;
        }
 
        private XDocument LoadTweetXML(bool isMentions)
        {
            try
            {
                string url;
                if (isMentions)
                    url = String.Format(
                        "http://search.twitter.com/search.atom?lang=en&q={0}",
                        System.Web.HttpUtility.UrlEncode(TwitterProfileName));
                else
                    url = String.Format(
                        "http://api.twitter.com/statuses/user_timeline.rss?screen_name={0}&count={1}",
                        TwitterProfileName, TweetCount);
                xDoc = XDocument.Load(url);
                return xDoc;
            }
            catch
            {
                return null;
            }
        }
 
        public class Tweet
        {
            public string Id { get; set; }
            public DateTime Published { get; set; }
            public string Title { get; set; }
            public string Content { get; set; }
            public string Link { get; set; }
            public Author Author { get; set; }
            public string Image { get; set; }
        }
 
        public class Author
        {
            public string Name { get; set; }
            public string Uri { get; set; }
        }
    }