I have some code which crops an image on a button click. The code works fine but if i try and crop another image before a page refresh I get the  "generic error occurred in GDI+." message. I'm 99% certain this is because the image/bitmap has not been cleared from the memory so cant be overwritten. I just can't see where or what to Dispose in the code below to get it to work.

Can anyone see what I'm doing wrong?

protected void _cropCommand_Click(object sender, EventArgs e)
    {
            string FullBasePath = "~/images/" + GetFolderBase + "/" + GetImageCode + "_" + GetImageNumber + ".jpg";
            string FullSavePath = "~/images/" + GetFolderSave + "/" + GetImageCode + "_" + GetImageNumber + ".jpg";

            using (var photo = System.Drawing.Image.FromFile(Server.MapPath(FullBasePath)))
            using (var result = new Bitmap(GetImageWidth, GetImageHeight, photo.PixelFormat))
            {
                result.SetResolution(photo.HorizontalResolution, photo.VerticalResolution);
                using (var g = Graphics.FromImage(result))
                {
                    g.InterpolationMode = InterpolationMode.HighQualityBicubic;
                    g.DrawImage(photo, new Rectangle(0, 0, 300, 200), new Rectangle(0, 0, 120, 80), GraphicsUnit.Pixel);
                    g.Dispose();
                    photo.Dispose();

                    ImageCodecInfo[] iciInfo = ImageCodecInfo.GetImageEncoders();
                    EncoderParameters encoderParameters;
                    encoderParameters = new EncoderParameters(1);
                    encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 83L);

                    result.Save(Server.MapPath(FullSavePath), iciInfo[1], encoderParameters);
                    result.Dispose();
                }
            }