I am migrating a Xamarin Forms app using MessageCenter to WeakReferenceMessenger

[davefxy]

I am migrating a Xamarin Forms app using MessageCenter to WeakReferenceMessenger. The messages are used within a control. I need to be able to distinguish messages sent from a instance of a control given that I can have multiple instances of this control on a page. How do I replace the following code:
MessagingCenter.Subscribe(this, "AutoSuggestBox_" + nameof(SuggestionChosen), (AutoSuggestBox box, object selectedItem) => { if (box == this) RaiseSuggestionChosen(selectedItem); });

I tried the following code:
WeakReferenceMessenger.Default .Register<AutoSuggestBox, SuggestionChosenNotification>(this, (r, m) => { if (r == this) RaiseSuggestionChosen(m.Value); });
The check for the AutoSuggestBox control instance isn't working. I am trying to determine if the message received is for this control instance. What is the proper way to implement this? With the current code all control instances display this message because :
if (r == this)
is not equivalent to :
if (box == this)