title: Entity Framework vs Linq to Entities vs Linq to SQL
body: <p>I read a lot of articles about how to work with a database in WPF .Net 4 application. As I understood, the main two technologies are:</p>
  
  <ul>
  <li>Linq to SQL (L2S)</li>
  <li>Entity Framework (EF)</li>
  </ul>
  
  <p>but sometimes I also can see mention of Linq to Entities (L2E) technology, but can't find clear explanation what difference between EF and L2E.</p>
  
  <p>So, my question is: Does there is any difference between Entity Framework and Linq to Entities technologies? Or this is synonyms for one technology?</p>