C# - Rss Feed in XMLDocument laden

/// <summary>
/// Gets the feed.
/// </summary>
/// <param name="rssUrl">The RSS URL.</param>
/// <returns></returns>
private static XmlDocument GetFeed(string rssUrl)
{
    var xmlDoc = new XmlDocument();
    var rssFeed = WebRequest.Create(rssUrl) as HttpWebRequest;
    if (rssFeed != null)
        xmlDoc.Load(rssFeed.GetResponse().GetResponseStream());
    return xmlDoc;
}