private void TimeFin_Tick(object sender, EventArgs e)
 {
     this.Opacity -= 0.1;
     if (this.Opacity == 0)
     {
         TimeFin.Stop();
         this.Close();
     }
 }
        //  int cont = 0;

        private void TimeInicio_Tick(object sender, EventArgs e)
        {
            if (this.Opacity < 1)
            {
                this.Opacity += 0.05;
            }
            barraCircular.Value += 1;
            barraCircular.Text   = barraCircular.Value.ToString();
            if (barraCircular.Value == 100)
            {
                TimeInicio.Stop();
                TimeFin.Start();
            }
        }