private void CapFullscreen()
        {
            var image = ScreenCapture.Fullscreen();
            string file = Path.GetTempFileName().Replace(".tmp",".png");

            try
            {
                image.Save(file, System.Drawing.Imaging.ImageFormat.Png);
                System.Diagnostics.Process.Start(file);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Fatal error");
            }
            finally
            {
                image.Dispose();
            }
        }