How to use certificate callback in SslStream.AuthenticateAsClient method?

Question

My C#.NET SSL connect works when I import the certificate manually in IE (Tools/Internet Options/Content/Certificates), but how can I load the certificate by code? Here is m

Answer 1

I wrote another method to add my certificate to Trusted Root Certification Authorities (root) before attempting to authenticate as client via SSLStream object:

public static void InstallCertificate()
    {
        X509Store store = new X509Store(StoreName.Root, StoreLocation.LocalMachine);
        store.Open(OpenFlags.ReadWrite);
        string fileName = "sslcert.pem";
        X509Certificate2 certificate1;
        try
        {
            certificate1 = new X509Certificate2(fileName);
        }
        catch (Exception ex)
        {
            throw new Exception("Error loading SSL certificate file." + Environment.NewLine + fileName);
        }

        store.Add(certificate1);
        store.Close();
    }

And then:

InstallCertificate();
sslStream.AuthenticateAsClient("Test");

It works fine without any warnings or errors. But base question still remains unsolved:

How can I use a certificate to authenticate as client without installing it in Windows?