Gets a collection of GroupDescription objects that defines how to group the items.
Assembly: PresentationFramework (in PresentationFramework.dll)
Property ValueType: System.Collections.ObjectModel.ObservableCollection<GroupDescription>
This property can be set only by accessing the collection object and using its various methods, such as Add. The property to access the collection object is read-only, while the collection itself is read-write.
Available since 3.0