Automapper mapping generic types

Question

I have 2 generic types that I need to map

public class A<T>
{
    public List<T> Results { get; set; }
    public int PropertyA { get; set; }
    public int PropertyB { get; set; }
}

and

public class B<T>
{
    public List<T> ResultContent { get; set; }
    public int PropertyC { get; set; }  
}

I've tried to map A to B using automapper as follows:

Mapper.CreateMap(typeof(A<>),typeof(B<>))
    .ForMember("ResultContent", f => f.MapFrom("Results"))
    .ForMember("PropertyC", f => f.MapFrom(?????))

It works fine for the ResultContent property. However, the issue is that B.PropertyC is a sum of properties A.PropertyA and A.PropertyB. Is it possible to compute mapping of properties for generic types?

Answer 1

For this you have to use a converter and ResolveUsing() which will define the operation to be performed.

See for instance this answer for more details.