✅ Need help with school project, premises is to convert and print WinForms into a PDF format

private void WinFormToPDF_Click(object sender, EventArgs e)
{
    try
    {
        // Create a new PDF document
        PdfDocument document = new PdfDocument();

        // Iterate through tabs
        foreach (TabPage tab in Main_TabPage.TabPages)
        {
            // Create a new PDF page for each tab
            PdfPage page = document.AddPage();
            XGraphics gfx = XGraphics.FromPdfPage(page);

            // Add content to the PDF page
            XFont font = new XFont("Arial", 12);
            XBrush brush = XBrushes.Black;
            gfx.DrawString("Data from WinForms:", font, brush, 100, 100);
        }

        // Save the PDF to a file
        string desktopPath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
        string pdfFileName = Path.Combine(desktopPath, "ETTV CALCULATION PDF.pdf");
        document.Save(pdfFileName);


        System.Diagnostics.Process.Start(pdfFileName);
        TaskDialog.Show("PDF Created", $"The information has been saved to {pdfFileName}");
        System.Diagnostics.Process.Start(pdfFileName);
    }
    catch (Exception ex)
    {
        MessageBox.Show("An error occurred: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
}