Persisting the selected record collection can be achieved by Iterating through the collection of SelectedRecords. Please refer the below code snippet which illustrates this:
//Iterates through the collection of SelectedRecords in GridGroup control.
foreach (SelectedRecord sel in this.GridGroupingControl1.Table.SelectedRecords)
Record r = sel.Record;
'Iterates through the collection of SelectedRecords in GridGroup control.
Dim sel As SelectedRecord
For Each sel In Me.GridGroupingControl1.Table.SelectedRecords
Dim r As Record = sel.Record
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