Mapping one source class to multiple derived classes with automapper

Question

Suppose i have a source class:

public class Source
{
    //Several properties that can be mapped to DerivedBase and its subclasses
}

And some d

Answer 1

For Automapper 8.0.
Current version has new method IncludeAllDerived
Here's working example:

        var config = new MapperConfiguration(cfg =>
        {
            cfg.CreateMap()
                .ForMember(dest => dest.Test3, opt => opt.MapFrom(src => src.Test))
                .IncludeAllDerived();

            cfg.CreateMap()
                .ForMember(dest => dest.Test4, opt => opt.MapFrom(src => src.Test2));

            cfg.CreateMap()
                  .ForMember(dest => dest.Test5, opt => opt.MapFrom(src => src.Test2));
        });

        var mapper = config.CreateMapper();

        var source = new Source { Test = "SourceTestProperty", Test2 = "SourceTest2Property" };
        var d1 = mapper.Map(source);
        var d2 = mapper.Map(source);

        Assert.Equal("SourceTestProperty", d1.Test3);
        Assert.Equal("SourceTest2Property", d1.Test4);

        Assert.Equal("SourceTestProperty", d2.Test3);
        Assert.Equal("SourceTest2Property", d2.Test5);