某网站HttpWebRequest始终超时

Question

运行环境：
vs2019 .net4.5
请求一个网站，浏览器可以访问，可是我用HttpWebRequest取构造一样的参数，始终是超时，附件是测试代码，请各位帮我看看

 class Program
    {
        static void Main(string[] args)
        {
            ServicePointManager.DefaultConnectionLimit = 200;
            ServicePointManager.ServerCertificateValidationCallback += (sender, certifice, chain, sslerror) => {
                return true;
            };
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
            HttpGet("https://www.arrow.com");
        }

        static void HttpGet(string url)
        {
            string html;
            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

            
            request.ProtocolVersion = HttpVersion.Version11;
            request.Method = "GET";
            request.Timeout = 40 * 1000;
            request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36";
            request.Host = "www.arrow.com";
            request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9";
            request.Headers.Add("accept-encoding", "gzip, deflate, br");
            request.Headers.Add("accept-language", "zh-CN,zh;q=0.9");
            //request.Headers.Add(":authority", "www.arrow.com");
            //request.Headers.Add(":method", "GET");
            //request.Headers.Add(":path", "/");
            //request.Headers.Add(":scheme", "https");
            request.Headers.Add("cache-control", "no-cache");
            request.Headers.Add("pragma", "no-cache");
            request.Headers.Add("sec-ch-ua", "\"Chromium\";v=\"106\", \"Google Chrome\";v=\"106\", \"Not;A=Brand\";v=\"99\"");
            request.Headers.Add("sec-ch-ua-mobile", "?0");
            request.Headers.Add("sec-ch-ua-platform", "\"Windows\"");
            request.Headers.Add("upgrade-insecure-requests", "1");
            request.Headers.Add("sec-fetch-site", "none");
            request.Headers.Add("sec-fetch-mode", "navigate");
            request.Headers.Add("sec-fetch-user", "?1");
            request.Headers.Add("sec-fetch-dest", "document");
            try
            {

                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
                {
                    var statusCode = response.StatusCode;
                    html = response.StatusDescription;
                    using (StreamReader sr = new StreamReader(response.GetResponseStream()))
                    {
                        html = sr.ReadToEnd();
                        Console.WriteLine(html);
                    }

                }
            }
            catch (WebException hex)
            {
                Console.WriteLine(hex.Message);
            }
            catch (Exception ex)
            {

                Console.WriteLine(ex.Message);
            }
        }
    }