When RadDataGrid uses LoadOnDemand with a plain ObservableCollection<T> as its ItemsSource, there is no supported API for the application to indicate that no further items are available.

As a result, the grid can continue raising LoadOnDemand requests after the data source has returned all available items. Applications must currently maintain pagination state and use a custom LoadMoreData command or other workarounds to prevent additional requests.

Provide a supported option that allows applications to stop load-on-demand once no further data is available. The grid should resume requesting items when the relevant data/query state changes.