title: Bind XAML elements to entities TwoWay
body: <p>I want to bind an entity property (say <code>Salary</code>) to a property of a <code>XAML</code> element (like a <code>TextBox.Text</code>) 
  and use this binding to save <code>Text</code> of <code>TextBox</code> to salary field which is bound as a entity property to 'Text' of some <code>TextBox</code>.</p>
  
  <p>Something like the following :</p>
  
  <pre><code>&lt;Grid DataContext="Employee"&gt;
      &lt;TextBox Text="{Binding Path=Salary, Mode=TwoWay}"/&gt;
  &lt;/Grid&gt;
  </code></pre>