HttpWebRequest 忽略证书

HttpWebRequest 忽略证书（.net 4.0）：

System.Net.ServicePointManager.ServerCertificateValidationCallback =
                        new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);//验证服务器证书回调自动验证

            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(new Uri(Url));

。。。

protected bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {   // 总是接受  
            return true;
        }