Hi, I am new in this site and I want to ask a question about software designing.

This question is addressed to persons that use the development called "package by features".

"Package by features" scope is private and only main services are public. I know that we shouldn't expose the data model in the UI for avoiding the coupling between UI and business logic.
In the web context, I have a query manager that generate a response in html but I couldn't find a solution for a winform context.

What I mean is that in a Winform application, I don't want to import directories of data model.

How do we separate this from the UI in Winform context?

If I am not clear, please let me know.
Thank you.