Purpose

This was an experiment in embedding the necessary code from https://github.com/microsoft/XamlBehaviorsWpf which is MIT licensed. (this is the new open source version of system.windows.interactivity)

and wrapping that in our own namespace in DynamoCoreWPF. It works, it should be way more solid, performant, and memory stable than whatever workaround we can come up with - but it's ugly and a maintenance issue to have this code here...

It makes me think the best course of action might be to just update the sys.win.int 3.x (align with Revit) for now - and at the next major release switch to consuming xaml.behaviors.wpf instead.

feedback on these two PRs is appreciated.
#10162

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.

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