Hello
VCardSecurity has SaveToPEM but not LoadFromPEM, instead it has vCardContact.Security.Key which is a string property, means we need to convert the public key to string and encode as Base64, shouldn’t be a X509Cert…...certificate = new X509Certificate2("path_to_your_certificate.pfx", "your_password");...} Next Steps Ensure that the path to your certificate and the...