how to make stopwatch in c# code example

Example 1: stopwatch c#

var timer = new Stopwatch();

  timer.Start();
  // do stuff
  timer.Stop();
}

Example 2: c# stopwatch

private void timer1_Tick(object sender, EventArgs e)
{
    TimeSpan duration = DateTime.Now - _start;
    label3.Text = duration.ToString(<some format string>);
}