public static void WriteDocument()
        {
            //Declare a itextSharp document
            Document document = new Document(PageSize.A4);

            //Create our file stream and bind the writer to the document and the stream
            PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(@"C:\Users\User\Downloads\test.pdf", FileMode.Create));

            //Open the document for writing
            document.Open();

            //Add a new page
            document.NewPage();

            //Reference a Unicode font to be sure that the symbols are present.
            BaseFont bfArialUniCode = BaseFont.CreateFont(@"C:\Users\User\Downloads\ARIALUNI.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
            //Create a font from the base font
            Font font = new Font(bfArialUniCode, 12);

            //Use a table so that we can set the text direction
            PdfPTable table = new PdfPTable(1);
            //Ensure that wrapping is on, otherwise Right to Left text will not display
            table.DefaultCell.NoWrap = false;

            //Create a regex expression to detect hebrew or arabic code points
            const string regex_match_arabic_hebrew = @"[\u0600-\u06FF,\u0590-\u05FF]+";
            if (Regex.IsMatch("מה קורה", regex_match_arabic_hebrew, RegexOptions.IgnoreCase))
            {
                table.RunDirection = PdfWriter.RUN_DIRECTION_RTL;
            }

            //Create a cell and add text to it
            PdfPCell text = new PdfPCell(new Phrase("مرحبا يا رجل كيف حالك", font));
            //Ensure that wrapping is on, otherwise Right to Left text will not display
            text.NoWrap = false;

            //Add the cell to the table
            table.AddCell(text);

            //Add the table to the document
            document.Add(table);

            //Close the document
            document.Close();

            //Launch the document if you have a file association set for PDF's
            Process AcrobatReader = new Process();
            AcrobatReader.StartInfo.FileName = @"C:\Users\User\Downloads\test.pdf";
            AcrobatReader.Start();

        }