title: Missing HttpContext
body: <p>I've got a project which as a reference added to System.Web.</p>
  
  <p>However, it can't seem to pick up HttpContext. Doing this:</p>
  
  <pre><code>Imports System.Web
  _ApplicationBase = HttpContext.Current()
  </code></pre>
  
  <p>Tells me that HttpContext is not declared. If you look at the methods and properties inside System.Web there are hardly any showing: only AspHostingPermission, AspHostingPermissionAttribute, AspHostingPermissionLevel and Services.</p>
  
  <p>The reference is valid and pointing to the right place. This is driving me crazy - what have I missed?</p>
  
  <p>Cheers,
  Matt</p>