I believe your question is answered in the following article from our online help documentation for NetAdvantage WPF 2008 Volume 2:
About Data Binding (xamDataGrid)

The CollectionViewSource class does not implement IEnumerable, so I expect that xamDataGrid does not support it.

The ICollectionView interface does require implementing IEnumerable, so xamDataGrid should support it.

I don't why no body replies to my post.I am not getting any response.Is anything wrong with my post or what?