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event is removed since Q2 2014. You need to subscribe to the CollectionChanging
event which is fired before an item is added, removed, changed, moved, or the entire list is refreshed. Please take a look at the following code example:
//subscribe to the CollectionChanging event
radGridView1.MasterTemplate.Columns.CollectionChanging += Columns_CollectionChanging;
//handle the event
sender, Telerik.WinControls.Data.NotifyCollectionChangingEventArgs e)
(e.Action == NotifyCollectionChangedAction.Move)
Should you have further questions, I would be glad to help.