public static void GetHead(string url)

       {

            var http = (HttpWebRequest)WebRequest.Create(url);

            http.Method = "HEAD";//设置Method为HEAD

            http.UserAgent = "Tujia-Auto-Test";

            try

            {

                HttpWebResponse response = (HttpWebResponse)http.GetResponse();

                Console.Write(Convert.ToInt32(response.StatusCode) + " " + response.StatusCode.ToString());//Statuscode 为枚举类型，200为正常，其他输出异常，需要转为int型才会输出状态码

                response.Close();

            }

            catch (WebException ex)

            {

                Console.WriteLine(Convert.ToInt32(((HttpWebResponse)ex.Response).StatusCode)+"  "+((HttpWebResponse)ex.Response).StatusCode.ToString());

            }

        }