【排查解决】System.Runtime.InteropServices.ExternalException (0x80004005): GDI+ 中发生一般性错误

        /// <summary>
        /// 合成图片
        /// </summary>
        /// <param name="backgroundImage">背景图</param>
        /// <param name="qrCodeImg">二维码图片</param>
        /// <param name="savePhysicalPath">图片存放物理路径</param>
        /// <param name="xDeviation">绘制图像X轴偏差</param>
        /// <param name="yDeviation">绘制图像Y轴偏差</param>
        /// <param name="width">绘制图像宽</param>
        /// <param name="height">绘制图像高</param>
        /// <returns></returns>
        public string CompositePicture(Image backgroundImage, Image qrCodeImg, string savePhysicalPath, int xDeviation = 0, int yDeviation = 0, int width = 0, int height = 0)
        {
            Bitmap bitmap = new Bitmap(backgroundImage.Width, backgroundImage.Height);
            Graphics graphics = Graphics.FromImage(bitmap);//绘图
            graphics.Clear(Color.White);
            SolidBrush surush = new SolidBrush(Color.White);
            graphics.DrawImage(backgroundImage, 0, 0, backgroundImage.Width, backgroundImage.Height);
            graphics.DrawImage(qrCodeImg, xDeviation, yDeviation, width, height);
            GC.Collect();//垃圾清理

            string compositePictureUrl = savePhysicalPath + Guid.NewGuid().ToString() + ".jpg";
            //合成图片保存
            bitmap.Save(compositePictureUrl, System.Drawing.Imaging.ImageFormat.Jpeg);

            return compositePictureUrl;
        }

            if (!Directory.Exists(savePhysicalPath))
            {
                Directory.CreateDirectory(savePhysicalPath);
            }