How can I use nested properties with the PropertySetMode Union/Intersection?

[Art]

I have many instances of same class A. And there is several properties of class B inside A, which can be expanded in PropertySetMode="None".

But when I trying to edit multiple objects by passing IEnumerable<object> of A as Item, there is no expanders in Union/Intersect modes.

This is understandable for the Union, but not for Intersect, where only same properties presented.

Maybe I can use the DataTemplateSelector or something else to solve this problem?

 

Microsoft Silverlight (64-bit) Version: 5.1.41105.0
Windows 8.1 (64-bit)
Internet Explorer 11.0.9600.17416
Telerik 2017.1.117.1050