Hm... I faced the issue with OnActivated overriding or OnLoaded overriding. If I invoke required method I don't see the view. The method I invoke is a long running computational and I\O bound task. It's very uncommon situtation. Yes it's a long running task but I really don't need the separate thread for it. Otherwise the view is not displayed. I don't want use separete thread even from thread pool, because of need to syncronize many parts of code and because the machine is very slow despite of that we run WPF app on it.
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