Sometimes you realize your current website is not rendered properly in Internet Explorer browser. As there are many version of IE, you can specifically target for each version by using a very simple html tag if condition.
The following example code, will target exactly the specific version of IE.
<!--[if IE 6]> <link href="ie6.css" type="text/css" rel="stylesheet"/> <![endif]--> <!--[if IE 7]> <link href="ie7.css" type="text/css" rel="stylesheet"/> <![endif]--> <!--[if IE 8]> <link href="ie8.css" type="text/css" rel="stylesheet"/> <![endif]--> <!--[if IE 9]> <link href="ie9.css" type="text/css" rel="stylesheet"/> <![endif]-->
Here is another example to target any IE version under 9.
<!--[if lt IE 9]> <link href="ie9.css" type="text/css" rel="stylesheet"/> <![endif]-->
Remember when designing a website, always check it against all browsers, most used browsers are firefox and chrome, followed by The Internet Explorer.