判断Web服务器是否在线的代码

public static bool isconnect()
        {
            try
            {
                HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create("http://192.168.0.252/jsfpWebSite/jsfpWebService.asmx");

                // Get the associated response for the above request.
                HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
                myHttpWebResponse.Close();
                return true;
            }
            catch (WebException e)
            {
                return false;
            }

        }