C# HttpWebRequest发送GET请求的问题

Question

ServicePointManager.DefaultConnectionLimit = 500;
ServicePointManager.Expect100Continue = true;
ServicePointManager.CheckCertificateRevocationList = false;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
string url = @"https://login.wx2.qq.com/jslogin?appid=wx782c26e4c19acffb";
HttpWebRequest wRequest = (HttpWebRequest)WebRequest.Create(url);
wRequest.Method = "GET";
wRequest.ContentType = "text/javascript";
wRequest.CookieContainer = CookiesContainer; //启用cookie
if (CookiesContainer == null)
{
CookiesContainer = new CookieContainer();
}
WebResponse wResponse = wRequest.GetResponse();
Stream stream = wResponse.GetResponseStream();
StreamReader reader = new StreamReader(stream, System.Text.Encoding.Default);

        string str = reader.ReadToEnd();   //url返回的值  
        MessageBox.Show(str);
        reader.Close();
        wResponse.Close();

 上面代码为什么在部分电脑上超时，手动打开网页没问题，求思路！

Answer 1

添加using System.Security.Cryptography.X509Certificates;空间，然后添加下面的代码

     public static bool SecurityValidate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
    {
        return true;//直接确认，不然打不开，会出现超时错误
    }


////////////添加这句
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(SecurityValidate);
//////////////
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;