Opc.Ua.CertificateValidator.IsIssuerAllowed C# (CSharp) Method

        private bool IsIssuerAllowed(X509Certificate2 certificate)
        {
            X509BasicConstraintsExtension constraints = new X509BasicConstraintsExtension();

            for (int ii = 0; ii < certificate.Extensions.Count; ii++)
            {
                constraints = certificate.Extensions[ii] as X509BasicConstraintsExtension;

                if (constraints != null)
                {
                    return constraints.CertificateAuthority;
                }
            }

            return false;
        }