title: Database object instantiate not found while instantiating
body: <p>I have a connection to database (Postgressql) and in the server explorer i can see it and connect to it but i can not instantiate it in my controller </p>
  
  <pre><code> public CentralEntities testDB = new CentralEntities();
  </code></pre>
  
  <p>the name is CentralEntities,and i get this error which says CentralEntities has not been found are you missing a reference ?strange thing is it used to work till yesterday </p>