Nigel Sampson

Hoping this is resolved in upcoming version of Windows / Visual Studio.

Sorry this slipped through the cracks. It's definitely known issue around the lack of visual tree on collapsed expanders. Can you expand on what you mean by view model first...

Thanks for that, a very indication of working vs not-working. I don't have bandwidth at the moment to look into why this difference exists, but it will be a great...

Definitely sounds like a bug, thanks for raising it.

So this looks like it comes out of an issue around `ObservableCollection` not populating the `NotifyCollectionChangedEventArgs.OldItems` when the collection is cleared. Because of this we don't hace access to the...

Yup, from discussions [this post][post] and [Stack Overflow][so]. it's a well known problem, but unfortunately has impacts into the WPF UI as where changing how notifications are done causes errors...

> In the specific case of conductors, i don't think raising multiple remove events instead of a single clear would cause problems, at least i'm not aware of a conductor...

Yeah, I suggest making this an opt in feature as it potentially could cause a breaking change in what action gets called.

I'd suggest making it a global fun with some relevant parameters, this way the behavior could be dynamic based on the inputs. If you're making this on by default then...

It's looking good, thanks. One thing I was considering was the trying to create a platform agnostic `INavigationService` that could be shared across platforms with a specific implementation per platform....