WPF INotifyPropertyChanged for linked read-only properties

Question

I am trying to understand how to update the UI if I have a read-only property that is dependent on another property, so that changes to one property update both UI elements

Answer 1

Depending on the expense of the calculation and how frequently you expect it to be used, it may be beneficial to make it a private set property and calculate the value when foo is set, rather than calculating on the fly when the bar get is called. This is basically a caching solution and then you can do the property change notification as part of the bar private setter. I generally prefer this approach, mainly because I use AOP (via Postsharp) to implement the actual INotifyPropertyChanged boilerplate.

-Dan