WPF BindingListCollectionView - Data add, edit .....

Hello,

Dim cv As BindingListCollectionView = CollectionViewSource.GetDefaultView(dt)

 
This Code works good:

Dim newRow = CType(cv.AddNew, System.Data.DataRowView).Row

This Code doesn't work:

Dim newRow = CType(cv.EditItem(cv.CurrentItem), System.Data.DataRowView).Row

Is there any possibility that "EditItem" and "View" work with each other?
 
Dirk