simple LINQ to XML query won't work

[vovva]

This Works , but very slow, \[code\][System.Web.Script.Services.ScriptMethod()][System.Web.Services.WebMethod]public static List<string> GetNames(string prefixText, int count) { XmlDocument xmlArtist = new XmlDocument(); xmlArtist.Load(string.Format(" http://ws.audioscrobbler.com/2.0/?method=chart.gettopartists&api_key={0}&limit=100", key)); List<string> topartists = new List<string>(); foreach (XmlNode node in xmlArtist.SelectNodes("lfm/artists/artist")) { string a = node.SelectSingleNode("name").InnerText.ToString(); if (a.Contains(prefixText)) { topartists.Add(a); } } return topartists;\[/code\]I want to turn that into a LINQ query to speed things up, I have not used LINQ in a while and been looking at a lot of examples and cannot figure out why this won't work.\[code\] [System.Web.Script.Services.ScriptMethod()][System.Web.Services.WebMethod]public static List<string> GetNames(string prefixText, int count) { List<string> topartists = new List<string>(); XElement element = XElement.Load("http://ws.audioscrobbler.com/2.0/?method=chart.gettopartists&api_key=...&limit=100"); IEnumerable<XElement> artists = from el in element.Elements("artist") where el.Element("name").Value.Contains(prefixText) select el; foreach (XElement el in artists) topartists.Add(el.Value); return topartists;\[/code\]THis is part of XML I have working with:\[code\] <lfm status="ok"> <artists page="1" perPage="100" totalPages="10" total="1000"> <artist> <name>Coldplay</name> <playcount>849564</playcount> <listeners>124389</listeners> <mbid>cc197bad-dc9c-440d-a5b5-d52ba2e14234</mbid> <url>http://www.last.fm/music/Coldplay</url> <streamable>1</streamable> <image size="small">http://userserve-ak.last.fm/serve/34/214667.png</image> <image size="medium">http://userserve-ak.last.fm/serve/64/214667.png</image> <image size="large">http://userserve-ak.last.fm/serve/126/214667.png</image> <image size="extralarge">http://userserve-ak.last.fm/serve/252/214667.png</image> <image size="mega">http://userserve-ak.last.fm/serve/_/214667/Coldplay.png</image> </artist> <artist> <name>Radiohead</name> <playcount>960812</playcount> <listeners>104849</listeners> <mbid>a74b1b7f-71a5-4011-9441-d0b5e4122711</mbid> <url>http://www.last.fm/music/Radiohead</url> <streamable>1</streamable> <image size="small">http://userserve-ak.last.fm/serve/34/24688757.png</image> <image size="medium">http://userserve-ak.last.fm/serve/64/24688757.png</image> <image size="large">http://userserve-ak.last.fm/serve/126/24688757.png</image> <image size="extralarge">http://userserve-ak.last.fm/serve/252/24688757.png</image> <image size="mega">http://userserve-ak.last.fm/serve/_/24688757/Radiohead.png</image> </artist> <artist>\[/code\]