title: System.Data.Entity.DbContext can't find to add as a reference
body: <p>When I go to build my project, I get this error:</p>
  
  <blockquote>
    <p>The type 'System.Data.Entity.DbContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.   </p>
  </blockquote>
  
  <p>I am trying to access my <code>DbContext</code> that I created with EF5.
  I tried to add <code>System.Data.Entity.DbContext</code> to my references, but I couldn't find it. What should I do?</p>