WPF MVVM Light Galasoft Upgrade and Messengers are not working -


we have legacy app uses mvvm light version 3.x. have had looping issues in application , want try upgrading mvvm light package latest 5.2. have lot of messengers in application. many of them still continue work expected, not. register, never listened for, between same view models have other calls work. experience issue when upgrading?


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