c# 图片加文字，横线，圆

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var imgPath = Path.Combine(AppContext.BaseDirectory, "Pic/style_02.png");            FileStream fs = new FileStream(imgPath, FileMode.Open);              System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(fs);            int imgPhotoWidth = imgPhoto.Width;            int imgPhotoHeight = imgPhoto.Height;            Bitmap bmPhoto = new Bitmap(imgPhotoWidth, imgPhotoHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);            bmPhoto.SetResolution(72, 72);            Graphics gbmPhoto = Graphics.FromImage(bmPhoto);            gbmPhoto.DrawImage(imgPhoto, new Rectangle(0, 0, imgPhotoWidth, imgPhotoHeight), 0, 0, imgPhotoWidth, imgPhotoHeight, GraphicsUnit.Pixel);            //gbmPhoto.DrawString("10", new Font("微软雅黑", 120), new SolidBrush(Color.White), new PointF(25, 0));            gbmPhoto.DrawString("10", new Font("微软雅黑", 120), new SolidBrush(Color.White),new  RectangleF(25, 0, 0, 0));            gbmPhoto.DrawString("麦当劳优惠券", new Font("黑体", 42), new SolidBrush(Color.White), new RectangleF(160, 40,0,0));            gbmPhoto.DrawString("订单满199使用", new Font("黑体", 34), new SolidBrush(Color.White), new RectangleF(160, 96,0,0));            //gbmPhoto.DrawString("使用说明：本优惠券仅限中国大陆地区售卖优\n惠券内产品的麦当劳餐厅使用，机场。", new Font("黑体", 18), new SolidBrush(Color.White), new PointF(25, 160));            gbmPhoto.DrawString("使用说明：本优惠券仅限中国大陆地区售卖优惠券内产品的麦当劳餐厅使用，机场。", new Font("黑体", 18), new SolidBrush(Color.White), new RectangleF(25, 160, 380, 100));//            gbmPhoto.FillRectangle(new SolidBrush(Color.FromArgb(255,180,100)), 32, 282, 379, 40);            gbmPhoto.DrawString("活动时间：6月30日到7月18日", new Font("黑体", 26), new SolidBrush(Color.FromArgb(94,55,29)), new RectangleF(48, 290,0,0));            //Pen pen = new Pen(Color.ForestGreen, 3); 画横线            //pen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash;            //pen.DashPattern = new float[] { 2, 2 };            //gbmPhoto.DrawLine(pen,435,15, 435, 350);              Brush bush = new SolidBrush(Color.White);//填充的bai颜色            for (int i = 0; i < 34; i++)            {                gbmPhoto.FillEllipse(bush, 435, 13+(i*10), 4, 4);            }            MemoryStream ms = new MemoryStream();            bmPhoto.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);            fs.Close();            ms.Close();            return new FileContentResult(ms.GetBuffer(), "image/jpeg");