XPdfFontOptions options = new XPdfFontOptions(PdfFontEncoding.Unicode, PdfFontEmbedding.Always);
this.NormalFont = new XFont("Arial", 8, XFontStyle.Regular, options);
this.BoldFont = new XFont("Arial", 8, XFontStyle.Bold, options);
this.TitleFont = new XFont("Arial", 12, XFontStyle.Bold, options);

static void Main()
{
  // Create new document
  PdfDocument document = new PdfDocument();

  // Set font encoding to unicode
  XPdfFontOptions options = new XPdfFontOptions(PdfFontEncoding.Unicode, PdfFontEmbedding.Always);

  //XFont font = new XFont("Times New Roman", 12, XFontStyle.Regular, options);
  XFont normalFont = new XFont("Arial", 8, XFontStyle.Regular, options);
  XFont boldFont = new XFont("Arial", 8, XFontStyle.Bold, options);
  XFont titleFont = new XFont("Arial", 12, XFontStyle.Bold, options);

  // Draw text in different languages
  for (int idx = 0; idx < texts.Length; idx++)
  {
    PdfPage page = document.AddPage();
    XGraphics gfx = XGraphics.FromPdfPage(page);
    XTextFormatter tf = new XTextFormatter(gfx);
    tf.Alignment = XParagraphAlignment.Left;

    //tf.DrawString(texts[idx], font, XBrushes.Black,
    //  new XRect(100, 100, page.Width - 200, 600), XStringFormats.TopLeft);
    tf.DrawString(texts[idx], normalFont, XBrushes.Black,
      new XRect(100, 100, page.Width - 200, 600), XStringFormats.TopLeft);
    tf.DrawString(texts[idx], boldFont, XBrushes.Black,
      new XRect(100, 300, page.Width - 200, 600), XStringFormats.TopLeft);
    tf.DrawString(texts[idx], titleFont, XBrushes.Black,
      new XRect(100, 500, page.Width - 200, 600), XStringFormats.TopLeft);
  }

  const string filename = "Unicode_tempfile.pdf";
  // Save the document...
  document.Save(filename);
  // ...and start a viewer.
  Process.Start(filename);
}