Notes for HttpWebResponse class

You MUST call Close method to close the response and release the connection.

HttpWebRequest HttpWReq = (HttpWebRequest)WebRequest.Create("http://www.google.com");

HttpWebResponse HttpWResp = (HttpWebResponse)HttpWReq.GetResponse();
// Insert code that uses the response object.
HttpWResp.Close();

http://msdn2.microsoft.com/en-us/library/system.net.httpwebresponse.aspx