title: Run webapi without installing .net4.5
body: <p>I have a website running aspx pages, under asp.net4.0.</p>
  
  <p>I also have some DevExpress controls, that I purchased 4 years ago.</p>
  
  <p>I now want to add an API to the web application, however I understand that needs .net4.5 to be running.</p>
  
  <p>The DevExpress controls don't work under 4.5 - so I would need to renew them at considerable cost.</p>
  
  <ol>
  <li>it possible, after installing .net4.5, for my site to continue to
  use .net4 - and not the new 4.5?  so that I can have the site
  operate under 4.0, and the API under 4.5?</li>
  <li>Or is it possible to have the API (using the Entity Framework)
  run under .net 4.0</li>
  </ol>
  
  <p>Thank you,</p>
  
  <p>Mark</p>