Thank you for your question.
ListBox controls in general support selected items (yellow background), and an active item (border). When the ListBox gets focus, the active item is shown so that keyboard users can know where they are when navigating with up/down.
I checked the retrieval of the selected item after the ClearSelected()
function was called and it was null,
so I think that it works correctly. If I am wrong, please open a Bug Report and attach a sample application demonstrating the issue.
About the active item (border) - you can remove it visually by applying a theme that does not draw a border (please see the attached archive) or you can remove it entirely
by using the following code whenever needed
Don't hesitate to contact me if you have further questions.
the Telerik team
Check out Telerik Trainer
, the state of the art learning tool for Telerik products.