Validation in OnChanged?

[plettb]

I'm using CommunityToolkit.Mvvm in my WPF application. I have an ObservableProperty I want to validate, but the validation it too complex for an attribute. I'm already overriding the OnChanged event. Is there a way I can add custom validation to that event? So far in my research I haven't found a way to add to the errors collection, nor trigger the error event.