Select 2 random items from an RSS feed

I have an RSS feed which I am currently displaying 2 items, what I am wanting is for every time the page is reloaded that a different 2 items are displayed. The code I currently have is

//BBC UK 
        string RssFeedUrl = "http://ift.tt/1Rjha6i";


        List<Feeds> feeds = new List<Feeds>();
        try
        {
            XDocument xDoc = new XDocument();
            xDoc = XDocument.Load(RssFeedUrl);

            var items = (from x in xDoc.Descendants("item").Take(2)
            select new
            {
              title = x.Element("title").Value,
              link = x.Element("link").Value,
              pubDate = x.Element("pubDate").Value,
              description = x.Element("description").Value
            });

        foreach (var i in items)
                {
                    Feeds f = new Feeds
                    {
                        Title = i.title,
                        Link = i.link,
                        PublishDate = i.pubDate,
                        Description = i.description
                    };

                    feeds.Add(f);

                }

How to a change this to select 2 random items each time the page is reloaded.