private ScreenCaptureJob job = null;
        public MainWindow()
        {
            InitializeComponent();
            job = new ScreenCaptureJob();
            job.CaptureMouseCursor = false;
        }

        private void BtnPlay_Click(object sender, RoutedEventArgs e)
        {
            BtnPause.IsEnabled = true;
            BtnStop.IsEnabled = true;
            BtnPlay.IsEnabled = false;
            if(job.Status == RecordStatus.NotStarted)
            {
                job.CaptureRectangle = Screen.PrimaryScreen.WorkingArea;
                job.OutputPath = "D:/ScreenCapture"; 
            }

            job.Start();
        }

        private void BtnPause_Click(object sender, RoutedEventArgs e)
        {
            BtnPlay.IsEnabled = true;
            BtnPause.IsEnabled = false;

            job.Pause();
        }

        private void BtnStop_Click(object sender, RoutedEventArgs e)
        {
            BtnPlay.IsEnabled = true;
            BtnPause.IsEnabled = false;
            BtnStop.IsEnabled = false;
            job.Stop();
        }

        private void OnClosing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            if (job.Status == RecordStatus.Running)
            {
                MessageBoxResult result =
                    System.Windows.MessageBox.Show("Capturing in Progress. Are You Sure You Want To Quit?", "Capturing",
                    MessageBoxButton.YesNo);
                if (result == MessageBoxResult.No)
                {
                    e.Cancel = true;
                    return;
                }
                job.Stop();
                job.Dispose();
            }
        }