Can't display arabic word in razor pages when export to pdf

any update

The same problem , arabic word comes like this :???? ????

using iTextSharp.text;
using iTextSharp.text.pdf;
using System.IO;

public IActionResult OnPostGeneratePDF()
{
    // Get invoice information from form
    string invoiceNumber = Request.Form["InvNo"];
    string invoiceDate = Request.Form["InvDate"];

    // Create PDF document
    using (MemoryStream memoryStream = new MemoryStream())
    {
        Document document = new Document();
        PdfWriter writer = PdfWriter.GetInstance(document, memoryStream);
        document.Open();

        // Font settings for Arabic text
        string fontPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts), "arial.ttf");
        BaseFont baseFont = BaseFont.CreateFont(fontPath, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
        Font arabicFont = new Font(baseFont, 12, Font.NORMAL);

        // Add Arabic text to PDF
        Paragraph paragraph = new Paragraph("??? ????????: " + invoiceNumber, arabicFont);
        document.Add(paragraph);

        paragraph = new Paragraph("????? ????????: " + invoiceDate, arabicFont);
        document.Add(paragraph);

        // Add company name, item names, item prices, total price, etc. as needed

        document.Close();

        // Export PDF
        return File(memoryStream.ToArray(), "application/pdf", "invoice.pdf");
    }
}

• The font path is retrieved dynamically using Environment.GetFolderPath to ensure the correct path.
• The font used is changed to "Arial" which is a common font supporting Arabic characters. Adjust the font path accordingly if needed.
• BaseFont.IDENTITY_H is used for Arabic text encoding.