Something like below could work using ScreenCapture which you could get it from the following link
Screen Capture
and you use it as below
ScreenCapture sc = new ScreenCapture();
Image img = sc.CaptureScreen();
this.imageDisplay.Image = img;
sc.CaptureWindowToFile(this.Handle,@"C:\tmp\pic.gif",ImageFormat.Gif);
i hope this helps