[CONNECT Update 16 .NET] PickListProviderManagedExample

The SDK delivers .NET example DgnEC\PickListProviderExample.  I can build that example successfully.  However, I don't understand what it does.  The two commands have little visible effect.  The AddIn has a WPF user interface, but neither command shows that interface.  What have I missed?

Perhaps the ReadMe file could be expanded with a better explanation?