Using IE conditional comments inside a stylesheet

I know that you can use an IE conditional comment inside HTML:

<!--[if IE]>
  <link href="ieOnlyStylesheet.css" />
<![endif]-->

But what if I want to target only IE in a stylesheet, setting up a css rule for a specific element inside the html. For example, you can use this Chrome/Safari hack inside the css file as css code...

@media screen and (-webkit-min-device-pixel-ratio:0) {
    .myClass{
        background: #fff;
        background:rgba(255,0,255,0.7);
    }
}

But using the IE hack inside the CSS stylesheet like this:

 <!--[if IE]>
      .myClass{
        background: #fff;
        background:rgba(255,0,255,0.7);
    }
 <![endif]-->

does not work. What do I use inside a stylesheet to target IE only?