How can I make a PriorityBinding fail if the value returned is Null?
I have a PriorityBinding <PriorityBinding FallbackValue="Bindings were null"> <Binding Path="Foo" /> <Binding Path="Bar" /> </PriorityBinding> I'd like to make it so if Foo is null it will use Bar and if both are null it will use the FallbackValue. However null is a valid value for this property because it only expects an obj...