Tengo que capturar la captura de pantalla de Desktop después de cada segundo. en la aplicación Winform se está ejecutando bien. pero después de mover el código al Servicio de Windows, no está capturando la captura de pantalla. ¿Alguna idea de por qué no lo está haciendo?

aquí está el código

public partial class ScreenCaptureService : ServiceBase
    {
        System.Timers.Timer timer = new System.Timers.Timer();

        public ScreenCaptureService()
        {
            InitializeComponent();            
            this.timer.Interval = 1000;
            this.timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);

        }

        void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            CaptureScreen();
        }

        protected override void OnStart(string[] args)
        {
            if (!EventLog.SourceExists(this.ServiceName, Environment.MachineName))
            {
                EventLog.CreateEventSource(
                    new EventSourceCreationData(
                        this.ServiceName,
                        Environment.MachineName
                        )
                );
            }

            EventLog.WriteEntry(this.ServiceName, "The OnStart event has been called");
            this.timer.Enabled = true;
            CaptureScreen();
        }

        protected override void OnStop()
        {
            EventLog.WriteEntry(this.ServiceName, "The OnStop event has been called");
            this.timer.Enabled = false;
        }

        static int count = 1;
        private void CaptureScreen()
        {

            Bitmap printscreen = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);

            Graphics graphics = Graphics.FromImage(printscreen as Image);

            graphics.CopyFromScreen(0, 0, 0, 0, printscreen.Size);

            printscreen.Save(@"C:\printscreen" + count++ + ".jpg", ImageFormat.Jpeg);

            EventLog.WriteEntry(this.ServiceName, "Screenshot Captured");
        }
}