Currently `AObservableObject.OnPropertyChanged(ref T target, T value)` checks for inequality before setting the value and raising the event. In hindsight, that was not the best choice for the default behavior. The method should set the target to the value and raise the event without any comparisons. To address this poor design, I suggest the following: 1. Deprecate the two `OnPropertyChanged()` methods. 2. Implement `RaisePropertyChanged()` methods using the new desired default behavior. 3. Implement `RaiseIfPropertyChanged()` method that takes an `EqualityComparer<T>`. 4. Implement `RaiseIfPropertyChanged()` override to wrap the previous default behavior.