title: timer cannot be added as a control in winforms
body: <p>why does this gives error: <code>this.Controls.Add(timer1);</code></p>
  
  <p>but this doesn't : <code>this.Controls.Add(button1);</code></p>
  
  <p>When both , the button and timer are controls then why can't we add the timer as a control in winforms?</p>