title: Where and how is the _ViewStart.cshtml layout file linked?
body: <p>Here's the About.cshtml from the default MVC 3 template:</p>
  
  <pre><code>@{
      ViewBag.Title = "About Us";
  }
  
  &lt;h2&gt;About&lt;/h2&gt;
  &lt;p&gt;
       Put content here.
  &lt;/p&gt;
  </code></pre>
  
  <p>I would expect that a reference to the _ViewStart file would be found in the <code>About.cshtml</code>, but clearly it's not.</p>
  
  <p>I've looked in <code>global.asax</code> and <code>web.config</code>, but I can't find out how the <code>About.cshtml</code> file is "linked" with the layout from the _ViewStart file. </p>
  
  <p>Everything works as expected, I'd just like to know what's going on under the hood...</p>