Hello Divya,
Could you please confirm whether the changes you perform over the XML are done runtime, while the RadTreeView is live in a running WPF application ? Basically to refresh its items, the RadTreeView's ItemsSource must be bound to collection which implements INotifyCollectionChanged and INotifyPropertyChanged. Such collection is
ObservableCollection. If your changes over the XML are done runtime, probably you need to refresh both the XmlDataProvider and/or the TreeView's ItemsSource.
Regards,
Petar Mladenov
Telerik
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.