Consider this mapping of a subclass that has a property that I want ignored:

mapping.DefaultProfile(profile =>

{ profile.SubClassesAre(t => t.IsSubclassOf(typeof(MyAbstract))); }

);
mapping.Map<MyConcrete>(c =>

{ c.Member(x => x.MyProperty).Ignore(); }

);

The MyProperty of MyConcrete (which is a subclass of MyAbstract) doesn´t get ignored until I add this:

mapping.Map<MyAbstract>(f =>

{ f.Member(x => x.MyProperty).Ignore(); }

);

This is works for my case but I can foresee cases where I would want one concrete class to ignore this property of the abstract while I would want to include it in another.