Support for data virtualization required the creation of a new collection view. Since this new virtualizing collection view (DataGridVirtualizingCollectionView) shares members with the non-virtualizing collection view (DataGridCollectionView), a new base class was created (DataGridCollectionViewBase) to expose the shared members (see Table 1). The same structure was required for the XAML representations of the collection views, resulting in the creation of the DataGridCollectionViewSourceBase class, which is the base class for the DataGridCollectionViewSource and DataGridVirtualizingCollectionViewSource classes (see Table 2).

Table 1: Members moved from the DataGridCollectionView class to the DataGridCollectionViewBase class

Table 2: Members moved from the DataGridCollectionViewSource class to the DataGridCollectionViewSourceBase class

Obsolete Members

As of version 3.1, the IsAddingItem property exposed by the DataGridCollectionView class was rendered obsolete and replaced with the IsAddingNew property on the DataGridCollectionViewBase class to support the eventual implementation of the IEditableCollectionView interface.