Principal.js

using System;
using System.Drawing;
using System.Windows.Forms;
using Timer = System.Timers.Timer;

namespace R716IconoAnimadoBandejaSistema
{
    public partial class Principal : Form
    {
        private Icon[] imagenes;
        private Timer temporizador;
        private int contadorImagenes;

        public Principal()
        {
            InitializeComponent();

            imagenes = new Icon[8];
            temporizador = new Timer();
            temporizador.Enabled = true;
            temporizador.Interval = 1000D;
            temporizador.SynchronizingObject = this;
            temporizador.Elapsed += new System.Timers.ElapsedEventHandler(temporizador_Elapsed);

            inicializarIconNotificacion();
        }

        private void inicializarIconNotificacion()
        {
            // Creación menú contextual:
            ContextMenuStrip cmsMenuContextual = new ContextMenuStrip();
            cmsMenuContextual.Items.AddRange(new ToolStripItem[]
            {
                new ToolStripMenuItem("Más info"),
                new ToolStripSeparator(),
                new ToolStripMenuItem("Salir")
            });

            nicBandejaSistema.ContextMenuStrip = cmsMenuContextual;
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

            imagenes[0] = new Icon("Resources/MOON01.ICO");
            imagenes[1] = new Icon("Resources/MOON02.ICO");
            imagenes[2] = new Icon("Resources/MOON03.ICO");
            imagenes[3] = new Icon("Resources/MOON04.ICO");
            imagenes[4] = new Icon("Resources/MOON05.ICO");
            imagenes[5] = new Icon("Resources/MOON06.ICO");
            imagenes[6] = new Icon("Resources/MOON07.ICO");
            imagenes[7] = new Icon("Resources/MOON08.ICO");
        }

        private void temporizador_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            nicBandejaSistema.Icon = imagenes[contadorImagenes];
            ++contadorImagenes;
            if (contadorImagenes > 7)
            {
                contadorImagenes = 0;
            }
        }
    }
}