.NET (Core and Framework)

public string SaveImageToFile()
 {
   int done = 0;
   String file = "";
   while (done < 20)
   {
     if (((webbrowser1.IsBusy == false) && (webbrowser1.ReadyState == WebBrowserReadyState.Complete)) || (done == 19))
     {
       Bitmap docImage = new Bitmap(webbrowser1.Width, webbrowser1.Height);
       webbrowser1.DrawToBitmap(docImage, new Rectangle(webbrowser1.Location.X,
               webbrowser1.Location.Y, webbrowser1.Width, webbrowser1.Height));
       file = "C:\\Rumper\\tempA" + num + ".bmp";
       docImage.Save(file, System.Drawing.Imaging.ImageFormat.Bmp);
       ++num;
       done = 20;
     }
     else
     {
       System.Threading.Thread.Sleep(100);
       Application.DoEvents();
       ++done;
     }
   }
   return file;
 }