code for displaying tweets

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C#

ASP.NET

Hi,
On internet i came to find a code for embedding my tweets in website. The code is

XmlDocument twitter = new XmlDocument();
       twitter.Load(@"http://twitter.com/statuses/user_timeline/15224867.rss");
       XmlNodeList twitterNodes = twitter.SelectNodes("/rss/channel/item");
       for (int i = 0; i <= 5; i++)
       {
           Repeater1.DataSource = twitterNodes;
           Repeater1.DataBind();
       }

But when i run it it shows error on the line

twitter.Load(@"http://twitter.com/statuses/user_timeline/15224867.rss");

i don't know what the url is meant for can you please explain me what it is