title: How to edit boolean in a DataGridCheckBoxColumn in Silverlight 3
body: <p>I have a <code>datagrid</code> with some <code>TextColumn</code> and one <code>DataGridCheckBoxColumn</code>. I bind it with a <code>itemsource</code> that contains a boolean and I can see that my <code>checkboxes</code> or checked or not by the boolean everything is OK at this point.</p>
  
  <p>But the checkboxs cells are in ReadOnly even if I assign <code>IsReadOnly = False</code>. I can't find the right and clean way to enable the editing.</p>
  
  <p>I dont need data validation but juste to be able to edit and check those checkboxes.</p>
  
  <p><img src="https://i.stack.imgur.com/z2FzI.png" alt="enter image description here"></p>