title: Nullable property to entity field, Entity Framework through Code First
body: <p>Using the data annotation <code>Required</code> like so:</p>
  
  <pre><code>[Required]
  public int somefield {get; set;}
  </code></pre>
  
  <p>Will set <b>somefield</b> to <code>Not Null</code> in database, How can I set <b>somefield</b>
  to allow NULLs?, I tried setting it through SQL Server Management Studio but Entity Framework set it back to <em><code>Not Null</code></em>.</p>