PrintTable.cs

           var rows = String.Join("", Enumerable.Range(1, 100).Select(i => $"<tr><td>row #{i}</td></tr>").ToArray());

            var html = $@"
<div>
    <table>
      <thead>
        <tr>
          <td>header</td>
        </tr>
      </thead>
      <tbody>
        <tr>
          <td>
            <table>
              <thead>
                <tr>
                  <td>header2</td>
                </tr>
              </thead>
              <tbody>
                {rows}
              </tbody>
            </table>
          </td>
        </tr>
      </tbody>
    </table>
</div>
";

            var Renderer = new IronPdf.HtmlToPdf();
            var pdf = Renderer.RenderHtmlAsPdf(html);
            var OutputPath = @"c:\users\jens\downloads\test.pdf";
            pdf.SaveAs(OutputPath);