Intercept all PropertyChanged without register callback

[workgroupengineering]

From the tests I made, the Skia backend does not support Geometry transformations.

In a private PR I am trying to do the refactoring. In the Geometry class I need to intercept all the changes of the DependencyProperty to invalidate the Bounds.

How can I do?

In the derived classes of Geometry , I can do the ovveraide of the OnPropertyChanged2 method, but in Geometry it is not possible because OnPropertyChanged2 is generated by the DependencyObjectGenerator.

[workgroupengineering]

I found it by myself. I must use RegisterDisposablePropertyChangedCallback.

[jeromelaban]

You can use OnPropertyChanged2 in Shape, the generator will avoid generating the method when already present. In general it's now best to use OnPropertyChanged2 because RegisterDisposablePropertyChangedCallback requires delegates. RegisterDisposablePropertyChangedCallback should be used when observing changes for other types.