title: Intellisense does not working for Visual Studio project (SharePoint , Application Page)
body: <p>I am using Visual Studio 2013 update 3. I created a SharePoint project which contains an application page. It has been working for a while. Today when I reopened the project the intellisense stoped working and generates this warning <code>Unrecognized tag prefix or device filter 'asp'</code>. All other projects have no problem</p>