Check if a url is reachable - Help in optimizing a Class
Well, firstly it would be better to have a using statement for your response instead of just calling Close - in this case there's not much difference, but in general using statements are the way to go.
As for testing the result status - just cast the response to HttpWebResponse and then use the StatusCode property. Something like this:
HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url);request.Timeout = 15000;request.Method = "HEAD"; // As per Lasse's commenttry{ using (HttpWebResponse response = (HttpWebResponse) request.GetResponse()) { return response.StatusCode == HttpStatusCode.OK; }}catch (WebException){ return false;}