Hi Ceramist,
Unfortunately, currently we don't support serializing InlineUIContainers. This feature in our development plans, but I cannot specify any timeframe for its development yet. Our plans involve introducing API (events and virtual methods of FormatProviders) that will allow developer to implement its own approach for serialization.
Let us know if you have any suggestions about how do you expect this feature to work or if you need any further assistance.
Sincerely yours,
Ivailo
the Telerik team
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