title: How to add CDN to bundle.config in asp.net webforms bundling
body: <p>I am using asp.net bundling / minification and putting everything in bundle.config like this:</p>
  
  <pre><code>&lt;styleBundle path="~/css/css"&gt;
    &lt;include path="~/css/bootstrap.css" /&gt;
    &lt;include path="~/css/flexslider.css" /&gt;
    &lt;include path="~/css/font-awesome.css" /&gt;
    &lt;include path="~/css/Site.css" /&gt;
    &lt;include path="~/css/orange.css" /&gt;
  &lt;/styleBundle&gt;
  </code></pre>
  
  <p>But I would like to use bootstrap.css from a CDN:</p>
  
  <pre><code>//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.min.css
  </code></pre>
  
  <p>So how can we do this in the bundle.config?</p>