显示GIF图标报错：“A generic error occurred in GDI+.”

 public static Image BytesToImage(this byte[] bytes)

 {

        Image image = null;

        if (bytes != null)

        {

               using (MemoryStream  sm=new MemoryStream(bytes))

                {

                    image = Image.FromStream(sm);

                }

         }

            return image;

 }