如何将视图逻辑从模型和业务逻辑中排除在MVVM中的视图模型之外？

I can't quite figure out how to get the view model to be notified of changes in the model without adding a bunch of UI specific stuff like INotifyProperyChanged and INotifyCollectionChanged in my model or create tons of different events and do a bunch of things that feel like they're UI specific and should stay out of the model.I can't quite figure out how to get the view mo