iTextSharp.text.pdf.BarcodePDF417.CreateDrawingImage C# (CSharp) Метод

        public virtual System.Drawing.Image CreateDrawingImage(System.Drawing.Color foreground, System.Drawing.Color background) {
            PaintCode();
            int h = (int)yHeight;
            int stride = (bitColumns + 7) / 8;
            System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(bitColumns, codeRows * h);
            int y = 0;
            for (int k = 0; k < codeRows; ++k) {
                for (int hh = 0; hh < h; ++hh) {
                    int p = k * stride;
                    for (int j = 0; j < bitColumns; ++j) {
                        int b = outBits[p + (j / 8)] & 0xff;
                        b <<= j % 8;
                        bmp.SetPixel(j, y, (b & 0x80) == 0 ? background : foreground);
                    }
                    ++y;
                }
            }
            return bmp;
        }

        public void CreaTimbre(String dd)
        {
            BarcodePDF417 pdf417 = new BarcodePDF417();
            pdf417.Options = BarcodePDF417.PDF417_USE_ASPECT_RATIO;
            pdf417.ErrorLevel = 8;
               //"<TED version='1.0'><DD><RE>97975000-5</RE><TD>33</TD><F>1</F><FE>2014-05-28</FE><RR>77777777-7</RR><RSR>Pc Factory</RSR><MNT>119000</MNT><IT1>Parlantes Multimedia 180W.</IT1><CAF version='1.0'><DA><RE>10207640-0</RE><RS>JUAN CARLOS AGUIRRE RODRIGUEZ</RS><TD>33</TD><RNG><D>1</D><H>50</H></RNG><FA>2014-05-26</FA><RSAPK><M>uJ+OZ5qO9diB/c9MoZuwPs9ltKGAS1IbEymF7W3X3ZTq6ElExVkrlfp7uDoGR0DiBndor6Vyc+X4MRbsk6KC9w==</M><E>Aw==</E></RSAPK><IDK>100</IDK></DA><FRMA algoritmo='SHA1withRSA'>SGKR9otZoN8/5sIaKFJIbo08Jbt95UBh76fcFv21lfNsgauAcyzUF0FARrMyphMagJ0zzChJzU7R/Q0mrDvYvQ==</FRMA></CAF><TSTED>2014-05-28T09:33:20</TSTED></DD><FRMT algoritmo='SHA1withRSA'>GK7FRnNjgHLyRspdygg2WudvqqJ+OQchn8k/6TUrndBBNHsFHInEN34+KLTy\nFgRG/bmDIjclV4VTlgs3TIg/7A==\n</FRMT></TED>";

            pdf417.Options = BarcodePDF417.PDF417_FORCE_BINARY;

            Encoding iso = Encoding.GetEncoding("ISO-8859-1");
            byte[] isoBytes = iso.GetBytes(dd);

            pdf417.Text = isoBytes;
            // pdf417.SetText(contenido);

            System.Drawing.Bitmap imagen = new Bitmap(pdf417.CreateDrawingImage(Color.Black, Color.White));
            imagen.Save("Timbre.jpg");
        }