What is the idea behind this enum??? I don't get it. It simply duplicates System.Windows.Controls.SelectionMode. And what's even worse is that your controls are not consistent in using it, e.g. while SelectionMode in RadGridView uses System.Windows.Controls.SelectionMode, your RadListBox uses Telerik.Windows.Controls.SelectionMode. In my case this forces me to use a converter. It's not a big deal, but it's just inconsistent and superfluous.