title: can't add reference to System.Web.Hosting
body: <p>I am migrating a web application from VB to C#. I have also upgraded to Update 3 in VS2013. Were there changes to the <code>Hosting</code> class? I'm getting an error using <code>Hosting.HostingEnvironment.MapPath</code> and I can't even add a reference to <code>System.Web.Hosting</code> as it's nowhere to be found. When I try to search the assemblies when adding a reference, using the whole namespace i.e. <code>System.Web.Hosting</code>, it returns no result.</p>
  
  <p>I have the using statement in the class and it is NOT grayed out meaning it is being used for something but yet the code doesn't like <code>Hosting</code> in <code>Hosting.HostingEnvironment</code> as it's in glaring red. I don't even get the <code>Hosting</code> class in intellisense and the project has a reference to <code>System.Web</code></p>