scanning multiple page

// Scanner selected?
           var device = Devices.SelectedItem as Scanner;
           if (device == null)
           {
               MessageBox.Show("Please select a device.", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
               return;
           }
           // Scan
           var images = device.Scan();
           //Save the image
           strFinalImagename = txtPolicyno.Text + "_" + ddlDept.SelectedItem + "." + ddlFormat.SelectedItem;

           string strImagename = "test.jpg";
           string path = System.Configuration.ConfigurationSettings.AppSettings["Path"] + strImagename;
           if (File.Exists(path))
           {
               File.Delete(path);
           }
           System.IO.Directory.CreateDirectory(System.Configuration.ConfigurationSettings.AppSettings["Path"]);

           images.SaveFile(path);

           string ImageText = txtPolicyno.Text + "_" + ddlDept.SelectedItem;

           //System.Drawing.Bitmap bitMapImage = new System.Drawing.Bitmap(path);
           //System.Drawing.Graphics graphicImage = System.Drawing.Graphics.FromImage(bitMapImage);
           //graphicImage.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
           //graphicImage.DrawArc(new System.Drawing.Pen(System.Drawing.Color.White, 3), 90, 235, 150, 50, 0, 360);
           //graphicImage.DrawString(ImageText, new System.Drawing.Font("Arial", 15, System.Drawing.FontStyle.Regular), System.Drawing.SystemBrushes.WindowText, new System.Drawing.Point(550, 20));

           ////bitMapImage.Save(@"D:\" + strFinalImagename, System.Drawing.Imaging.ImageFormat.Jpeg);
           //bitMapImage.Save(System.Configuration.ConfigurationSettings.AppSettings["Path"] + strFinalImagename, System.Drawing.Imaging.ImageFormat.Jpeg);
           //graphicImage.Dispose();
           //bitMapImage.Dispose();

           using (var src = new System.Drawing.Bitmap(path))
           using (var bmp = new System.Drawing.Bitmap(1000, 1000, System.Drawing.Imaging.PixelFormat.Format32bppPArgb))
           using (var gr = System.Drawing.Graphics.FromImage(bmp))
           {
               gr.Clear(System.Drawing.Color.Blue);
               gr.DrawImage(src, new System.Drawing.Rectangle(0, 0, bmp.Width, bmp.Height));
               gr.DrawString(ImageText, new System.Drawing.Font("Arial", 15, System.Drawing.FontStyle.Regular), System.Drawing.SystemBrushes.WindowText, new System.Drawing.Point(550, 20));
               bmp.Save(System.Configuration.ConfigurationSettings.AppSettings["Path"] + strFinalImagename, System.Drawing.Imaging.ImageFormat.Png);
           }