C#

Timer

Timer Example ; Auto  Fire after 3 seconds...........................

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.Text;

using System.Timers;

namespace WindowsFormsApplication1

{

  

    public partial class Form1 : Form

    {

       private System.Timers.Timer timer;

       private int counter = 0;

       public Form1()

       {

        

           InitializeComponent();

           timer = new System.Timers.Timer();

           timer.Elapsed += timer_Elapsed;

           timer.Interval = (1000 * 3);

           timer.Start();

       }

       void timer_Elapsed(object sender, ElapsedEventArgs e)

       {

           counter = counter + 1;

       

               timer.Stop();

             MessageBox.Show(counter.ToString());

               timer.Start();

         

       }

    }

}

http://www.codeproject.com/Tips/480049/Shut-Down-Restart-Log-off-or-Lock-your-computer-in