WCF Could not establish trust relationship for the SSL/TLS Secure Channel With Authority

I saw people ask questions on the forums regarding to “Could not establish trust relationship for the SSL/TLS secure channel with authority” while attempting to call the web service via a host domain name other than the one specified in Issue-To within the SSL certificate. Most likely you are using the same certificate for the WCF web services hosted on other domains, for example, development or demo server.

A custom remote certificate validation can be used to avoid the strict validation, instead, just make it trust anything.

In your code, simply make a call to the static method SetCertificatePolicy() once within your application before making any request to the web services.

using System.Net;

using System.Net.Security;

using System.Security.Cryptography.X509Certificates;



// note this code is not intended to used 

// in production enviroment

public static class Util

{

    /// <summary>

    /// Sets the cert policy.

    /// </summary>

    public static void SetCertificatePolicy()

    {

        ServicePointManager.ServerCertificateValidationCallback

                   += RemoteCertificateValidate;

    }



    /// <summary>

    /// Remotes the certificate validate.

    /// </summary>

    private static bool RemoteCertificateValidate(

       object sender, X509Certificate cert, 

        X509Chain chain, SslPolicyErrors error)

    {

        // trust any certificate!!!

        System.Console.WriteLine("Warning, trust any certificate");

        return true;

    }

}

　引用自：http://www.codemeit.com/wcf/wcf-could-not-establish-trust-relationship-for-the-ssltls-secure-channel-with-authority.html