Polymorphic collection mapping may break if interface mappings are added

[jbogard]

atahualpa[CodePlex]
Here's a small example case where polymorph mapping works and fails:
interface IBase { }
interface IDerived : IBase { }
class Base : IBase { }
class Derived : Base, IDerived { }
class BaseDto { }
class DerivedDto : BaseDto { }

and following mappings:
Mapper.CreateMap<Base, BaseDto>().Include<Derived, DerivedDto>();
Mapper.CreateMap<Derived, DerivedDto>();
// try with and without the following two lines, also try with just the following two lines
Mapper.CreateMap<IBase, BaseDto>().Include<IDerived, DerivedDto>();
Mapper.CreateMap<IDerived, DerivedDto>();

List<Base> list = new List<Base>() { new Derived() };
Console.WriteLine(Mapper.Map<IEnumerable<Base>, BaseDto[]>(list).First().GetType() == typeof(DerivedDto));

If the interface mappings are not created, the Console will output True as expected and documented. However if only the interface mappings are created it will output False. I had hoped that it would have worked with just the interfaces (even though I understand that this may be difficult with multiple interface inheritance), but I didn't expect that it doesn't work anymore when interface mappings were created in addition to the class mappings.

[lock]

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