static void ExportAsPngImage(PdfDictionary image, ref int count)
        {
            int width = image.Elements.GetInteger(PdfSharp.Pdf.Advanced.PdfImage.Keys.Width);
            int height = image.Elements.GetInteger(PdfSharp.Pdf.Advanced.PdfImage.Keys.Height);
            int bitsPerComponent = image.Elements.GetInteger(PdfSharp.Pdf.Advanced.PdfImage.Keys.BitsPerComponent);
            System.Drawing.Imaging.PixelFormat pixelFormat = new System.Drawing.Imaging.PixelFormat();
            switch (bitsPerComponent)
            {   
                case 1:
                    pixelFormat = System.Drawing.Imaging.PixelFormat.Format1bppIndexed;
                    break;
                case 8:
                    pixelFormat = System.Drawing.Imaging.PixelFormat.Format8bppIndexed;
                    break;
                case 24:
                    pixelFormat = System.Drawing.Imaging.PixelFormat.Format24bppRgb;
                    break;
                default:
                    throw new Exception("Unknown pixel format " + bitsPerComponent);
            }
            Bitmap bmp = new Bitmap(width, height, pixelFormat);
            PdfSharp.Pdf.Filters.FlateDecode fd = new PdfSharp.Pdf.Filters.FlateDecode();
            byte[] arr = fd.Decode(image.Stream.Value);
            System.Drawing.Imaging.BitmapData bmd = bmp.LockBits(new Rectangle(0, 0, width, height), System.Drawing.Imaging.ImageLockMode.WriteOnly, pixelFormat);
            System.Runtime.InteropServices.Marshal.Copy(arr, 0, bmd.Scan0, arr.Length);
            bmp.UnlockBits(bmd);
            bmp.Save("c:\\bmp1.png", System.Drawing.Imaging.ImageFormat.Png);
        }

        static void ExportAsPngImage(PdfDictionary image, ref int count)
        {
            int width = image.Elements.GetInteger(PdfSharp.Pdf.Advanced.PdfImage.Keys.Width);
            int height = image.Elements.GetInteger(PdfSharp.Pdf.Advanced.PdfImage.Keys.Height);
            int bitsPerComponent = image.Elements.GetInteger(PdfSharp.Pdf.Advanced.PdfImage.Keys.BitsPerComponent);
            System.Drawing.Imaging.PixelFormat pixelFormat = new System.Drawing.Imaging.PixelFormat();
            PdfSharp.Pdf.PdfArray arr = image.Elements.GetArray(PdfSharp.Pdf.Advanced.PdfImage.Keys.ColorSpace);
            switch (bitsPerComponent)
            {
                case 1:
                    pixelFormat = System.Drawing.Imaging.PixelFormat.Format1bppIndexed;
                    break;
                case 8:
                    pixelFormat = System.Drawing.Imaging.PixelFormat.Format8bppIndexed;
                    break;
                case 24:
                    pixelFormat = System.Drawing.Imaging.PixelFormat.Format24bppRgb;
                    break;
                default:
                    throw new Exception("Unknown pixel format " + bitsPerComponent);
            }

            PdfSharp.Pdf.Filters.FlateDecode fd = new PdfSharp.Pdf.Filters.FlateDecode();
            byte[] origineel_byte_boundary = image.Stream.UnfilteredValue;//fd.Decode(image.Stream.Value);
            byte[] resultaat_byte_boundary = null;
            int new_width = width;
            int allignment = 4;

            if (new_width % allignment != 0)
            //Image data in BMP files always starts at a DWORD boundary, in PDF it starts at a BYTE boundary.
            //Most images have a width that is a multiple of 4, so there is no problem with them.
            //You must copy the image data line by line and start each line at the DWORD boundary.
            {
                while (new_width % allignment != 0)
                    new_width++;
                byte[,] copy_dword_boundary = new byte[height, new_width];

                for (int y = 0; y < height; y++)
                {
                    for (int x = 0; x < new_width; x++)
                    {
                        if (x <= width && (x + (y * width) != origineel_byte_boundary.Length ) )
                            // while not at end of line, take orignale array
                            copy_dword_boundary[y, x] = origineel_byte_boundary[x + (y * width)];
                        else //fill new array with ending 0
                            copy_dword_boundary[y, x] = 0;
                    }
                }
                resultaat_byte_boundary = new byte[new_width * height];
                int counter = 0;
                for (int x = 0; x < copy_dword_boundary.GetLength(0); x++)
                {
                    for (int y = 0; y < copy_dword_boundary.GetLength(1); y++)
                    {   //put 2dim array back in 1dim array
                        resultaat_byte_boundary[teller] = copy_dword_boundary[x, y];
                        counter ++;
                    }
                }
            }
            else
            {
                resultaat_byte_boundary = new byte[new_width * height];
                origineel_byte_boundary.CopyTo(resultaat_byte_boundary, 0);
            }

            System.Drawing.Imaging.BitmapData bmd = bmp.LockBits(new Rectangle(0, 0, new_width, height), System.Drawing.Imaging.ImageLockMode.WriteOnly, pixelFormat);
            System.Runtime.InteropServices.Marshal.Copy(resultaat_byte_boundary, 0, bmd.Scan0, resultaat_byte_boundary.Length);
            bmp.UnlockBits(bmd);
            using (FileStream fs = new FileStream("C:\\" + String.Format("Image{0}.png", count), FileMode.Create, FileAccess.Write))
            {
                bmp.Save(fs, System.Drawing.Imaging.ImageFormat.Png);
            }