private bool IsSignedWith(X509Certificate2 signed, AsymmetricAlgorithm pubkey)
{
if (pubkey == null)
{
return(false);
}
// Sadly X509Certificate2 doesn't expose the signature nor the tbs (to be signed) structure
MX.X509Certificate mx = signed.MonoCertificate;
return(mx.VerifySignature(pubkey));
}