TextBox not being updated

I have a textBox2 on my windows form (confirmed name & spelling) I drug a timer from the toolbox over to my windows form and it is named timer1. I am trying to have the timer begin when the button is pressed and have textBox2 show each incrementing second so it shows a running time of how long the entire process has taken. Where did I err?

public partial class Form1 : Form
{
    private int duration = 0;
    private void button1_Click(object sender, EventArgs e)
    {
        timer1.Enabled = true;
        timer1.Start();
        First();
        Second();
        Thirds();
        Fourth();
        Fifth();
        timer1.Stop();
    }
    private void timer1_Tick(object sender, EventArgs e)
    {
        duration++;
        textBox2.Text = duration.ToString();
    }
}