If you resize the image, after resizing the image background occurs a white color in top and bottom

foreach (var a in lstr)
       {
            imgexts = a.Photo;
            if (imgexts != null)
           {
                imgname = Utility.Encrypt(string.Format(ComponentStockResearch.GetImageFormat(), a.StockResearchID)) + a.Photo;

                if (imgname != null)
                {
                   spath = Server.MapPath(Request.ApplicationPath) + "gallery/large/" + imgname;
                    if (System.IO.File.Exists(spath))
                    {

                        ComponentImageResize objImg = new ComponentImageResize();

                        Bitmap bmpimage = new Bitmap(spath, false);
                        System.Drawing.Image stockhome = objImg.CreateThumbNail(bmpimage, (int)ClsConvert.ToInt(Util.GetConfigKey("StockReaserch_List_W")), (int)ClsConvert.ToInt(Util.GetConfigKey("StockReaserch_List_H")));
                       stockhome.Save(Server.MapPath(Request.ApplicationPath) + "\\gallery\\StockResearchList\\" + imgname);
                        //stockhome.Save(Server.MapPath(Request.ApplicationPath) + "\\gallery\\featuredarticlehome\\" + spath);


                   }
               }
            }