Turning around: Resolving Error "Basic Connection closed: failed to establish trust relationship for SSL/TLS security channel ."

When I write a program today, I call a third-party DLL file. The local debugging is normal, but the program does not always prompt a BUG after it arrives at the server: "The basic connection has been closed: failed to establish trust relationship for SSL/TLS Security Channel ".
Later, the DLL file was decompiled and an error occurred while obtaining the request. Reference WebResponse response = WebRequest. Create ("https ://...... "). GetResponse ();

Then, open the above address in the browser on the server and a confirmation certificate window will pop up, which seems to be a certificate problem.
After a search on the Internet, I found that it is easy to use and add a line of code before the request. C # code

1. ServicePointManager. CertificatePolicy = new AcceptAllCertificatePolicy ();

ServicePointManager.CertificatePolicy = new AcceptAllCertificatePolicy();

The AcceptAllCertificatePolicy must be defined by yourself: C # code

1. Internal class AcceptAllCertificatePolicy: ICertificatePolicy
2. {
3. Public AcceptAllCertificatePolicy ()
4. {
5. }
7. Public bool CheckValidationResult (ServicePoint sPoint,
8. X509Certificate cert, WebRequest wRequest, int certProb)
9. {
10. // Always accept
11. Return true;
12. }
13. }

internal class AcceptAllCertificatePolicy : ICertificatePolicy    {        public AcceptAllCertificatePolicy()        {        }        public bool CheckValidationResult(ServicePoint sPoint,           X509Certificate cert, WebRequest wRequest, int certProb)        {            // Always accept            return true;        }    }

The preceding method solves the problem, but in VS, it will prompt that ServicePointManager. CertificatePolicy has been rejected. As I like perfection, follow the prompts to use a new method.
The transformed code is more concise and clear C # code

1. ServicePointManager. ServerCertificateValidationCallback = ValidateServerCertificate;

ServicePointManager.ServerCertificateValidationCallback = ValidateServerCertificate;

C # code

1. Private bool ValidateServerCertificate (object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
2. {
3. Return true;
4. }

private bool ValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)        {            return true;        }

That's it! A commission is done!

From: http://radiumwong.iteye.com/blog/684118