Customizing Group Row Header of Silverlight DataGrid

Earlier in December 2010, I posted three articles on DataGrid titled as "Grouping Records in Silverlight DataGrid using PagedCollectionView", "Filtering Records in Silverlight DataGrid using PagedCollectionView" and "Paginating Records in Silverlight DataGrid using PagedCollectionView". If you didn't read them, go thru each articles to know more about Silverlight DataGrid. One of my reader "Dan"