Using Timer in C#

1,Drag & drop timer from Visual Studio tool box

2,To start timer

timer1.Start();

3,To Stop Timer

timer1.Stop();

4,Timer Tick event (Executes every second if timer started)

private void timer1_Tick(object sender, EventArgs e)
{
commands
}

5,To count down using Timer

private void timer1_Tick(object sender, EventArgs e)
{
label3.Text = (Convert.ToInt32(label3.Text) - 1).ToString();
}