title: How I can define different css files for different browsers in asp.net?
body: <p>How I can define css files for different browsers? For Example I want that if a User use the firefox that a div is width='1000px' and if a User use IE 7- 9 or higher have a div witdh='800px'.</p>
  
  <p>I work with ASP.NET and C#. What can I do if I want make a Application for more Browser?</p>