Microsoft.Xades.XadesSignedXml.CheckXadesCIsXadesT C# (CSharp) Method

        public virtual bool CheckXadesCIsXadesT()
        {
            UnsignedSignatureProperties unsignedSignatureProperties;
            bool retVal;

            retVal = true;
            unsignedSignatureProperties = this.XadesObject.QualifyingProperties.UnsignedProperties.UnsignedSignatureProperties;
            if (((unsignedSignatureProperties.CompleteCertificateRefs != null) && (unsignedSignatureProperties.CompleteCertificateRefs.HasChanged()))
                || ((unsignedSignatureProperties.CompleteCertificateRefs != null) && (unsignedSignatureProperties.CompleteCertificateRefs.HasChanged())))
            {
                if (unsignedSignatureProperties.SignatureTimeStampCollection.Count == 0)
                {
                    throw new CryptographicException("XAdES-C signature should also contain a SignatureTimeStamp element");
                }
            }

            return retVal;
        }