using System.Xml;

using System.Xml.Linq;

...

...

XmlReader reader = new XmlTextReader(opmlUrl);

XElement opml = XElement.Load(reader);

var results = from c in opml.Element("body").Element("outline").Elements("outline")

        where c.Attribute("type").Value == "rss" && c.Attribute("xmlUrl") != null

        select new opmlItem

        {

            Name = c.Attribute("title").Value,

            Text = c.Attribute("text").Value,

            RSS = c.Attribute("xmlUrl").Value

        };

reader.Close();