C # Picture processing pixel quality code issues

Private byte[] Putlogoinimage (image commodityimage, image priceimage, string activeprice, bool Checked11, imag

            e brandlogoimage = null) {byte[] result = NULL;
            Image im = Commodityimage; using (Image mypriceimage = Priceimage.clone () as Image) {logopriceimage (Mypriceimage, active

                Price, CHECKED11); Create a brush using (Graphics g = graphics.fromimage (IM)) {G.interpolationmo
                    de = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                    G.pixeloffsetmode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;

                    g.compositingquality = System.Drawing.Drawing2D.CompositingQuality.Default;
                        if (brandlogoimage!= null) {using (Bitmap BM = new Bitmap (brandlogoimage))
                {//hit upper left corner            G.drawimage (BM, new System.Drawing.Rectangle (0, 0, BM.) Width, BM. Height), 0, 0, BM. Width, BM.
                        Height, GraphicsUnit.Pixel);
                        The using (Bitmap BM = new Bitmap (mypriceimage)) { #region thumbnail//var tempimg= BM.
                        Getthumbnailimage ((), INTPTR, NULL, New ()); G.drawimage (tempimg, new Rectangle (IM). Width-tempimg.width, im.  
                        Height-tempimg.height, Tempimg.width, tempimg.height)); #endregion//BM. Maketransparent (Color.White); Comment out, otherwise the bottom chart will have an effect on the icon ZHJW 20151102//hit to the lower right corner of G.drawimage (BM, new Rectangle (IM.W IDTH-BM. Width, im. HEIGHT-BM. Height, BM. Width, BM.
                    Height));
 }///will save the picture byte[] using (MemoryStream ms = new MemoryStream ())           {using (Bitmap BMP = new Bitmap (IM))//must create a new object {var ici
                    = Getimageencoder (IM); if (ici = null) {BMP. Save (MS, im.
                    Rawformat);
                        else {using (var EP = new EncoderParameters {Param = new encoderparameter[] {new encoderpa
                            Rameter (System.Drawing.Imaging.Encoder.Quality, 100L)}}) { Bmp.
                        Save (MS, ICI, EP); result = Ms.
                ToArray ();
        } return result; private static ImageCodecInfo Getimageencoder (Image img) {//Critical quality control//Get the number of system encoding types
            Group that contains the Jpeg,bmp,png,gif,tiffvar icis = Imagecodecinfo.getimageencoders ();
            ImageCodecInfo ici = null; foreach (ImageCodecInfo i in ICIS) {if (IMG).
                    Rawformat.guid = = I.formatid)//Picture format consistent//if (I.mimetype = = "Image/png")//default fetch PNG encoder {
                    ICI = i;
                Break
        } return ICI; }