Occurs when a row group is unloading.
public event EventHandler<DataGridRowGroupHeaderEventArgs> UnloadingRowGroup
This event enables you to make any necessary changes to the row details element before it is reused. You typically use this event to undo any changes that were made in a LoadingRowDetails event handler.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.