protected void btnConvert_Click(object sender, EventArgs e)
{
    string urlToConvert = textBoxWebPageURL.Text.Trim();

    PdfConverter pdfConverter = new PdfConverter();

    // set the license key
    pdfConverter.LicenseKey = "B4mYiJubiJiInIaYiJuZhpmahpGRkZE=";

    // set header
    pdfConverter.PdfHeaderOptions.HeaderHeight = float.Parse(textBoxHeaderHeight.Text.Trim());
    AddHeaderElements(pdfConverter);

    // set footer
    pdfConverter.PdfFooterOptions.FooterHeight = float.Parse(textBoxFooterHeight.Text.Trim());
    AddFooterElements(pdfConverter);

    // handle the PrepareRenderPdfPageEvent to set the header and footer visibility in each page
    pdfConverter.PrepareRenderPdfPageEvent += new PrepareRenderPdfPageDelegate(pdfConverter_PrepareRenderPdfPageEvent);

    // Performs the conversion and get the pdf document bytes that can 
    // be saved to a file or sent as a browser response
    byte[] pdfBytes = pdfConverter.GetPdfBytesFromUrl(urlToConvert);

    // remove event handler
    pdfConverter.PrepareRenderPdfPageEvent -= new PrepareRenderPdfPageDelegate(pdfConverter_PrepareRenderPdfPageEvent);

    // send the generated PDF document to client browser

    // get the object representing the HTTP response to browser
    HttpResponse httpResponse = HttpContext.Current.Response;

    // add the Content-Type and Content-Disposition HTTP headers
    httpResponse.AddHeader("Content-Type", "application/pdf");
    httpResponse.AddHeader("Content-Disposition", String.Format("attachment; filename=HtmlToPdfFeatures.pdf; size={0}", pdfBytes.Length.ToString()));

    // write the PDF document bytes as attachment to HTTP response 
    httpResponse.BinaryWrite(pdfBytes);

    // Note: it is important to end the response, otherwise the ASP.NET
    // web page will render its content to PDF document stream
    httpResponse.End();
}

void pdfConverter_PrepareRenderPdfPageEvent(PrepareRenderPdfPageParams eventParams)
{
    // set the header and footer visibility on first, odd and even pages
    if (cbShowFooter.Checked)
    {
        if (eventParams.PageNumber == 1 && !cbShowFooterOnFirstPage.Checked)
            eventParams.Page.ShowFooter = false;
        else if ((eventParams.PageNumber % 2) == 0 && !cbShowFooterOnEvenPages.Checked)
            eventParams.Page.ShowFooter = false;
        else if ((eventParams.PageNumber % 2) == 1 && !cbShowFooterOnOddPages.Checked)
            eventParams.Page.ShowFooter = false;
    }

    if (cbShowHeader.Checked)
    {
        if (eventParams.PageNumber == 1 && !cbShowHeaderOnFirstPage.Checked)
            eventParams.Page.ShowHeader = false;
        else if ((eventParams.PageNumber % 2) == 0 && !cbShowHeaderOnEvenPages.Checked)
            eventParams.Page.ShowHeader = false;
        else if ((eventParams.PageNumber % 2) == 1 && !cbShowHeaderOnOddPages.Checked)
            eventParams.Page.ShowHeader = false;
    }
}

private void AddHeaderElements(PdfConverter pdfConverter)
{
    // set the header HTML area
    HtmlToPdfElement headerHtml = new HtmlToPdfElement(0, 0, 0, pdfConverter.PdfHeaderOptions.HeaderHeight,
            "<b>HTML in Header</b>", null, 1024, 0);
    headerHtml.FitHeight = true;
    headerHtml.EmbedFonts = cbEmbedFonts.Checked;
    pdfConverter.PdfHeaderOptions.AddElement(headerHtml);

    if (cbDrawHeaderLine.Checked)
    {
        // set the header line
        float pdfPageWidth = 0;
        if (pdfConverter.PdfDocumentOptions.PdfPageOrientation == PdfPageOrientation.Portrait)
            pdfPageWidth = pdfConverter.PdfDocumentOptions.PdfPageSize.Width;
        else
            pdfPageWidth = pdfConverter.PdfDocumentOptions.PdfPageSize.Height;

        LineElement headerLine = new LineElement(0, pdfConverter.PdfHeaderOptions.HeaderHeight,
                    pdfPageWidth - pdfConverter.PdfDocumentOptions.LeftMargin - pdfConverter.PdfDocumentOptions.RightMargin,
                    pdfConverter.PdfHeaderOptions.HeaderHeight);
        headerLine.LineStyle.LineWidth = 0.5f;
        headerLine.ForeColor = Color.FromKnownColor((KnownColor)Enum.Parse(typeof(KnownColor), ddlHeaderLineColor.SelectedItem.ToString()));
        pdfConverter.PdfHeaderOptions.AddElement(headerLine);
    }
}

private void AddFooterElements(PdfConverter pdfConverter)
{
    //write the page number
    TextElement footerText = new TextElement(0, pdfConverter.PdfFooterOptions.FooterHeight - 15, "This is page &p; of &P;  ",
        new System.Drawing.Font(new System.Drawing.FontFamily("Times New Roman"), 10, System.Drawing.GraphicsUnit.Point));
    footerText.EmbedSysFont = true;
    footerText.TextAlign = HorizontalTextAlign.Right;
    pdfConverter.PdfFooterOptions.AddElement(footerText);

    // set the footer HTML area
    HtmlToPdfElement footerHtml = new HtmlToPdfElement(0, 0, 0, pdfConverter.PdfFooterOptions.FooterHeight,
                "<i>HTML in Footer</i>", null, 1024, 0);
    footerHtml.FitHeight = true;
    footerHtml.EmbedFonts = cbEmbedFonts.Checked;
    pdfConverter.PdfFooterOptions.AddElement(footerHtml);

    if (cbDrawFooterLine.Checked)
    {
        // set the footer line
        float pdfPageWidth = 0;
        if (pdfConverter.PdfDocumentOptions.PdfPageOrientation == PdfPageOrientation.Portrait)
            pdfPageWidth = pdfConverter.PdfDocumentOptions.PdfPageSize.Width;
        else
            pdfPageWidth = pdfConverter.PdfDocumentOptions.PdfPageSize.Height;

        LineElement footerLine = new LineElement(0, 0,
                    pdfPageWidth - pdfConverter.PdfDocumentOptions.LeftMargin - pdfConverter.PdfDocumentOptions.RightMargin, 0);
        footerLine.LineStyle.LineWidth = 0.5f;
        footerLine.ForeColor = Color.FromKnownColor((KnownColor)Enum.Parse(typeof(KnownColor), ddlFooterLineColor.SelectedItem.ToString()));
        pdfConverter.PdfFooterOptions.AddElement(footerLine);
    }
}