HOWTO: Get rid of " Could Not Establish Trust Relationship with Remote Server" error

If you are getting this error " Could Not Establish Trust Relationship with Remote Server" when trying to access a webservice secured by SSL, then read on. One possible issue might be that you do not have a SSL Certificate isssued by a trusted Certification Authority(CA). (Another case of error is explained in this Microsoft Article: http://support.microsoft.com/?scid=kb;en-us;823177). For both these instances workaround given in MS article is a possible solution. It is simple to implement, add this class that implements ICertificatePolicy and add this line of code before you call your web service.

System.Net.ServicePointManager.CertificatePolicy = new MyPolicy();

Code for the class is given below,

using System.Net;
using System.Security.Cryptography.X509Certificates;

public class MyPolicy : ICertificatePolicy {
public bool CheckValidationResult(
ServicePoint srvPoint
, X509Certificate certificate
, WebRequest request
, int certificateProblem) {

//Return True to force the certificate to be accepted.
return true;

} // end CheckValidationResult
} // class MyPolicy


You could also check for specific errors/warnings in the CheckValidationResult method, in the above given example, it overrides any error!

Happy coding:)