How can I delay?

Question

Lets Say My code is:

private void button1_Click(object sender, EventArgs e)
        {
            webBrowser1.Navigate("http://www.google.com");

// I WANT TO DELAY 5 SECONDS HERE. I WANT TO VISIT FACEBOOK.COM AFTER 5 SECONDS AUTOMATICALLY. WHAT CODE SHOULD I WRITE?
           
            webBrowser1.Navigate("http://facebook.com");
        }

HELP ME PLEASE. CHEERS