title: cannot edit cell in datagrid WPF
body: <p>I've a <code>DataGrid</code> in my view binded to an <code>ObservableCollection&lt;&gt;</code>. The binding works.</p>
  
  <p>The problem is that I cannot edit any cell and don't understand why...</p>
  
  <p>Here is my XAML :</p>
  
  <pre><code>&lt;DataGrid ItemsSource="{Binding ClientSpecifications, Mode=TwoWay}" /&gt;
  </code></pre>
  
  <p>Only this. Nothing more. But it doesn't work. I'm working with WPF, .NET4, EF.</p>