title: Disable FormGroup controls in Reactives FormModule in Angular2
body: <p>I am using <code>Reactive FormsModule</code> in <code>Angular2</code>. Now, I want to disable all controls of <code>FormGroup</code>. I can use <code>readOnly</code> property in all controls but it is not better solution as we might add new fields in near future.<br><br>
  So, Is there anyway to disable <code>FormGroup</code> controls in short ?</p>