怎么保留格式生成pdf

<div class="texte-libre-rose" style="text-align: right; margin-right: -25px;">
    <h1 style="color: rgb(34, 34, 34); text-transform: none; line-height: normal; text-indent: 0px; letter-spacing: normal; font-family: Arial, Verdana, sans-serif; font-style: normal; font-variant: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;">
        <img alt="" src="http://a.cksource.com/c/1/inc/img/demo-little-red.jpg" style="width: 120px; height: 168px; margin-right: 10px; margin-left: 10px; float: left; cursor: default;" />Little Red Riding Hood</h1>
    <table align="right" border="1" cellpadding="1" cellspacing="1" style="font: 12px/normal Arial, Verdana, sans-serif; width: 200px; color: rgb(34, 34, 34); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; font-size-adjust: none; font-stretch: normal; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;">
        <caption>
            <strong>International Names</strong></caption>
        <tbody>
            <tr>
                <td>
                    Chinese</td>
                <td>
                    <i>小紅帽</i></td>
            </tr>
            <tr>
                <td>
                    Italian</td>
                <td>
                    <i>Cappuccetto Rosso</i></td>
            </tr>
            <tr>
                <td>
                    Spanish</td>
                <td>
                    <i>Caperucita Roja</i></td>
            </tr>
        </tbody>
    </table>
    <p style="font: 12px/normal Arial, Verdana, sans-serif; color: rgb(34, 34, 34); text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; white-space: normal; orphans: 2; widows: 2; font-size-adjust: none; font-stretch: normal; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;">
        &nbsp;</p>
</div>
<p>
    &nbsp;</p>

public static void Generate(string htmlText)
        {


            Document pdfDocument = new Document(PageSize.A4, 50, 25, 15, 10);
            PdfWriter wri = PdfWriter.GetInstance(pdfDocument, new FileStream("test.pdf", FileMode.Create));
            //wri.PageEvent = new PageEvent("");
            pdfDocument.Open();
            HTMLWorker htmlWorker = new HTMLWorker(pdfDocument);
            TextReader htmlReader = new StringReader(htmlText);
            htmlWorker.Parse(htmlReader);
            pdfDocument.Close();
            
            System.Diagnostics.Process.Start("test.pdf");
        }