    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 = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

        // Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed
        // Set this property to 0 if you don't need to wait for such asynchcronous operations to finish
        htmlToPdfConverter.ConversionDelay = 2;

        // Set the encryption algorithm and the encryption key size if they are not the default ones
        if (!bit128RadioButton.Checked || !rc4RadioButton.Checked)
        {
            // set the encryption algorithm
            htmlToPdfConverter.PdfSecurityOptions.EncryptionAlgorithm = rc4RadioButton.Checked ? EncryptionAlgorithm.RC4 : EncryptionAlgorithm.AES;

            // set the encryption key size
            if (bit40RadioButton.Checked)
                htmlToPdfConverter.PdfSecurityOptions.KeySize = EncryptionKeySize.EncryptKey40Bit;
            else if (bit128RadioButton.Checked)
                htmlToPdfConverter.PdfSecurityOptions.KeySize = EncryptionKeySize.EncryptKey128Bit;
            else if (bit256RadioButton.Checked)
                htmlToPdfConverter.PdfSecurityOptions.KeySize = EncryptionKeySize.EncryptKey256Bit;
        }

        // Set user and owner passwords
        if (userPasswordTextBox.Text.Length > 0)
            htmlToPdfConverter.PdfSecurityOptions.UserPassword = userPasswordTextBox.Text;

        if (ownerPasswordTextBox.Text.Length > 0)
            htmlToPdfConverter.PdfSecurityOptions.OwnerPassword = ownerPasswordTextBox.Text;

        // Set PDF document permissions
        htmlToPdfConverter.PdfSecurityOptions.CanPrint = printEnabledCheckBox.Checked;
        htmlToPdfConverter.PdfSecurityOptions.CanPrintHighResolution = highResolutionPrintEnabledCheckBox.Checked;
        htmlToPdfConverter.PdfSecurityOptions.CanCopyContent = copyContentEnabledCheckBox.Checked;
        htmlToPdfConverter.PdfSecurityOptions.CanCopyAccessibilityContent = copyAccessibilityContentEnabledCheckBox.Checked;
        htmlToPdfConverter.PdfSecurityOptions.CanEditContent = editContentEnabledCheckBox.Checked;
        htmlToPdfConverter.PdfSecurityOptions.CanEditAnnotations = editAnnotationsEnabledCheckBox.Checked;
        htmlToPdfConverter.PdfSecurityOptions.CanFillFormFields = fillFormFieldsEnabledCheckBox.Checked;

        if ((PermissionsChanged(htmlToPdfConverter) || htmlToPdfConverter.PdfSecurityOptions.UserPassword.Length > 0) &&
            htmlToPdfConverter.PdfSecurityOptions.OwnerPassword.Length == 0)
        {
            // A user password is set but the owner password is not set or the permissions are not the default ones
            // Set a default owner password
            htmlToPdfConverter.PdfSecurityOptions.OwnerPassword = "owner";
        }

        // 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=Set_Permissions_Password.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();
    }