How determine redirect url

[Meysam Mahfouzi]

How can I know where a url gets redirected programatically? e.g. This url: http://scobleizer.com/feed/ redirects to the following url: http://feeds2.feedburner.com/fastcompany/scobleizer I am trying to read the xml document of feed. But the following lines of code:

var doc = new XmlDocument();
doc.Load(url);

will throw an exeption for the first url:

System.Net.WebException: The remote server returned an error: (404) Not Found.