When you set a RadGridView's SelectionMode to GridViewSelectionMode.CellSelect and then you highlight full rows by using the row header, the SelectedRows collection is empty. Telerik support informed me this is "as expected" and that I should use "SelectedCells" collection when using the CellSelect Mode. While this is a decent workaround I don't see why SelectedRows collection can't be filled when the entire row is actually highlighted.