protected void convertToPdfButton_Click(object sender, EventArgs e)
{
    // Create a HTML to PDF converter object with default settings
    HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter();

    // Set license key received after purchase to use the converter in licensed mode
    // Leave it not set to use the converter in demo mode
    htmlToPdfConverter.LicenseKey = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og=";

    // Add custom HTTP cookies

    if (cookie1NameTextBox.Text.Length > 0 && cookie1ValueTextBox.Text.Length > 0)
        htmlToPdfConverter.HttpRequestCookies.Add(cookie1NameTextBox.Text, cookie1ValueTextBox.Text);

    if (cookie2NameTextBox.Text.Length > 0 && cookie2ValueTextBox.Text.Length > 0)
        htmlToPdfConverter.HttpRequestCookies.Add(cookie2NameTextBox.Text, cookie2ValueTextBox.Text);

    if (cookie3NameTextBox.Text.Length > 0 && cookie3ValueTextBox.Text.Length > 0)
        htmlToPdfConverter.HttpRequestCookies.Add(cookie3NameTextBox.Text, cookie3ValueTextBox.Text);

    if (cookie4NameTextBox.Text.Length > 0 && cookie4ValueTextBox.Text.Length > 0)
        htmlToPdfConverter.HttpRequestCookies.Add(cookie4NameTextBox.Text, cookie4ValueTextBox.Text);

    if (cookie5NameTextBox.Text.Length > 0 && cookie5ValueTextBox.Text.Length > 0)
        htmlToPdfConverter.HttpRequestCookies.Add(cookie5NameTextBox.Text, cookie5ValueTextBox.Text);

    // Convert the HTML page to a PDF document in a memory buffer
    byte[] outPdfBuffer = htmlToPdfConverter.ConvertUrl(urlTextBox.Text);

    // Send the PDF as response to browser

    // Set response content type
    Response.AddHeader("Content-Type", "application/pdf");

    // Instruct the browser to open the PDF file as an attachment or inline
    Response.AddHeader("Content-Disposition", String.Format("attachment; filename=HTTP_Cookies.pdf; size={0}", outPdfBuffer.Length.ToString()));

    // Write the PDF document buffer to HTTP response
    Response.BinaryWrite(outPdfBuffer);

    // End the HTTP response and stop the current page processing
    Response.End();
}