I'm not sure I understand the scenario in which the issue is reproduced. Basically when you set the SelectionMode
, you allow the RadTreeView
to have a collection of multiple selected items. So if you have a selected item in the RadTreeView
, you can add a new item and select the new item as well. If this is your case, and you need to have only one selected item, then you can clear the RadTreeView.SelectedItems
collection before adding a new selected item.
If this isn't the case in which the issue is reproduced, please elaborate a bit more on your scenario and specifically - when and how you add a new selected item. Also, if you can send over a sample solution demonstrating the issue, we will gladly take a closer look at your implementation and advice you how to proceed.
All the best,
the Telerik team