I was looking at your ListBox configurator example at http://demos.telerik.com/silverlight/#ListBox/Configurator
, and I am confused by some of its functionality.
My scenario is this: I want to select a few items, then start searching for one I can't see in the list. However when I start typing, all of my selected items are then unselected.
I'd expect to be able to click some items, search for one, click the one I've searched for (Or indeed be able to press enter so as not to have to go back to the mouse), and it continue to add items, rather than clearing them all.