I have a class Destination with a constructor that takes parameters, and I’m trying to map a Source object to Destination using AutoMapper. The mapping for Id works fine, but the mapping for InStore doesn’t seem to work when I use a custom mapping. Here is my code:

using AutoMapper;

var config = new MapperConfiguration(cfg =>
{
    cfg.CreateMap<Source, Destination>()
       .ForMember(dest => dest.Id, opt => opt.MapFrom(src => int.Parse(src.Id)))
       .ForMember(dest => dest.InStore, opt => opt.MapFrom(src => src.InStore == "1"));
});

var mapper = config.CreateMapper();

var source = new Source { Id = "123", InStore = "1" };
var destination = mapper.Map<Destination>(source);

Console.WriteLine($"Id: {destination.Id}, InStore: {destination.InStore}");

public class Source
{
    public string Id { get; set; }
    public string InStore { get; set; }
}

public class Destination
{
    public int Id { get; private set; }
    public bool InStore { get; private set; }

    public Destination(int id, bool inStore)
    {
        Id = id;
        InStore = inStore;
    }
}

Throw exception:

AutoMapper.AutoMapperMappingException: 'Error mapping types.'
FormatException: String '1' was not recognized as a valid Boolean.

When I remove the parameterized constructor from Destination, the mapping works correctly. Also, when var source = new Source { Id = "123", InStore = "true" }; is used, the mapping also works. These observations confuse me as to why the mapping fails with a constructor present and when InStore is set to "1".