Библиотека для LZO

                byte[] buf = Encoding.UTF8.GetBytes(b.ToString());
                decoded = new byte[buf.Length];
                MiniLZO.Decompress(buf, decoded);

        protected BitmapSource DecodePreviewImage()
        {
            string[] size = RawContent["Preview"]["Size"].Replace(" ", "").Split(',');
            PreviewImageRect = new Int32Rect(size[0].ToInt32(), size[1].ToInt32(), size[2].ToInt32(), size[3].ToInt32());
            byte[] decoded = null;
            
            {
                StringBuilder b = new StringBuilder();
                KeyDataCollection previewPack = RawContent["PreviewPack"];
                for (int i = 1; i < previewPack.Count + 1; i++) b.Append(previewPack[i.ToString()]);
 
                byte[] buf = Encoding.UTF8.GetBytes(b.ToString());
                decoded = new byte[buf.Length];
                MiniLZO.Decompress(buf, decoded);
                //decoded = LZOCompressor.Compressor.Decompress(buf);
            }
 
            int pixels = (PreviewImageRect.Width - PreviewImageRect.X) * (PreviewImageRect.Height - PreviewImageRect.Y);
            Log.Trace(string.Format("[!!!!!!!!!] Pixels:{0}, Decoded(devided by 3):{1}", pixels, decoded.Length / 3));
            return null;
        }