C# - Interop dlls Bricscad21 versus Bricscad22

Hi all,
I'm implementing a C# application which interacts with Bricscad: opening file, saving them as PDF, ecc...

This application works fine with Bricscad version 21, and for interacting with it references to both Interop.BricscadApp.dll and Interop.BricscadDB.dll.

NB
Please note I really do not remember where I found those DLLs.
I was sure they were at
C:\Program Files\Bricsys\BricsCAD V21 en_US\API\dotNet\CsBrxMgd\CsBrxMgd\obj\x64\Debug
but they aren't.

I've just downloaded Bricscad version 22 and I'd like to test my application.
So, I'd change references to Interop for version 22... and here is my question/doubt:

Are any differences or can I continue working with Bricscad21 interop dlls beside Bricscad22?

T&R

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