title: How to use a factory for DataGrid.CanUserAddRows = true
body: <p>I would like to use the <strong>DataGrid.CanUserAddRows = true</strong> feature. Unfortunately, it seems to work only with concrete classes which have a default constructor. My collection of business objects doesn't provide a default constructor.</p>
  
  <p>I'm looking for a way to register a factory that knows how to create the objects for the DataGrid. I had a look at the DataGrid and the ListCollectionView but none of them seems to support my scenario.</p>