PdfRpt.Core.Security.SignatureWriter.signUsingTimeStampAuthority C# (CSharp) Method

        private void signUsingTimeStampAuthority(PdfStamper stamper)
        {
            if (string.IsNullOrEmpty(SignatureData.TsaClient.Url))
                throw new InvalidOperationException("Please specify the TimestampAuthorityClientUrl.");

            var signAppearance = setSignAppearance(stamper);
            addTsa(signAppearance);
        }