.NET Core, DocIO and PDF Conversion - Custom Document properties removed

         static void Main(string[] args)
        {
            Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("MY_KEY");

            string inputFile = "input_file_path";
            string outputFile = "Sample Output.docx";

            File.Copy(inputFile, outputFile, true);

            FileStream fileStream = new FileStream(outputFile, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);

            WordDocument doc = new WordDocument(fileStream, FormatType.Docx);

            DocIORenderer converter = new DocIORenderer();

            converter.Settings.AutoDetectComplexScript = true;
            converter.Settings.EmbedFonts = true;
            converter.Settings.EmbedCompleteFonts = true;

            PdfDocument pdfDocument = converter.ConvertToPDF(doc);

            FileStream pdfStream = File.Create("output.pdf");
            pdfDocument.Save(pdfStream);

            pdfDocument.Dispose();
            pdfStream.Dispose();

            doc.Dispose();
            fileStream.Dispose();
        }