date DateTime Now Timer timer new Timer timer Interval 10 timer Tick n

date = DateTime.Now;
Timer timer = new Timer();
timer.Interval = 10;
timer.Tick += new EventHandler(tickTimer);
if (start.Text == "Stop")
{
   timer.Stop();
   label2.Text = "STOP";
}
else
{
   timer.Start();
   label2.Text = "Start";
}