Arabic in pdf using iTextsharp in VB.NET

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VB

PDF

Hi all
I create a PDF file with Arabic text using iTextSharp in vb.net but when I run code the letters of the word in pdf are disjointed and every letter is alone not connected .

What I have tried:

Dim basef As BaseFont = BaseFont.CreateFont(fontPath, BaseFont.IDENTITY_H, True)
    Dim arabicfont As New iTextSharp.text.Font(basef, 24, iTextSharp.text.Font.NORMAL, iTextSharp.text.BaseColor.BLACK)
    Dim el As New Chunk()
    Dim arabicfont2 As New iTextSharp.text.Font(basef, 16, el.Font.Style, el.Font.Color)
    el.Font = arabicfont2


    Dim doc As Document = New Document(PageSize.A4)
    Dim wri As PdfWriter = PdfWriter.GetInstance(doc, fs)
    wri.RunDirection = iTextSharp.text.pdf.PdfWriter.RUN_DIRECTION_LTR

    doc.Open()
    Dim txe As iTextSharp.text.Paragraph = New TextSharp.text.Paragraph(StrReverse("الملف"), el.Font)

    doc.Add(txe)
    doc.Close()

Note : I want to do this without using PdfPTable ...

Can I get help or any suggestions about this ??
Thanks a lot