Hi
Victor,
A little follow up on the reported issue.
It turns out that it is possible to achieve the desired behavior (setting an initial Value, which is not overridden). In order to persist it you should override the "OnIsSelectedChanged" method and in it setting the desired value. You can check the attached project for a sample implementation.
Please, don't hesitate to contact us again if needed.
Regards,
Vladislav
Telerik
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