Sorting in RadListControl is controlled by the SortStyle property. The available sorting options are listed below:
Ascending: indicates ascending sorting.
Descending: indicates descending sorting.
None: indicates no sorting. Items appear in the order of inserting.
radListControl1.SortStyle = Telerik.WinControls.Enumerations.SortStyle.Ascending;
radListControl1.SortStyle = Telerik.WinControls.Enumerations.SortStyle.Ascending
Changing the SortStyle property may cause the SelectedIndexChanged event to fire if the position of the currently selected item has changed after the sort operation.