title: ComboBox DataSource And Entity FrameWork
body: <p>I add Data Model Entity to my project named <code>publishingCompanyEntities</code> And added ComboBox in my winform.
  but when i want to bind my list of authors into my combo box as data source has been filled with data , but <code>cmoAuthors.Items.Count</code> returns 0 but <code>cmoAuthors.DataSource.Count</code> returns 2 item</p>
  
  <pre><code>        publishContext = new publishingCompanyEntities();
          cmoAuthors.DataSource = publishContext.Authors;
          cmoAuthors.DisplayMember = "FirstName";
  </code></pre>