I have an odd requirement where I need map a single object to a list containing that single object, in a way that doesn’t break IQueryable / ProjectTo mapping.

I am unable to change the projected query or Dtos/Models.

There is a similar question here, but that one is easily answered since it isn’t using ProjectTo:
use automapper to map single object into a list of objects

class Team
{
    public string TeamName { get; set; }

    public List<TeamMember> TeamMembers { get; set; }
}

class TeamMember
{
    public string Name { get; set; }
}

class TeamMemberProfile : Profile
{
    public TeamMemberProfile()
    {
        this.CreateMap<Dto.TeamMember, TeamMember>(MemberList.None);

        this.CreateMap<Dto.TeamMember, Team>(MemberList.None)
            .ForMember(dest => dest.TeamName, src => src.MapFrom(src => src.TeamName))
            .ForMember(dest => dest.TeamMembers, src => src.MapFrom(src => new List<TeamMember> { src }));
    }
}

As expected, an AutoMapper.AutoMapperMappingException occurs:

Unable to create a map expression from . (Dto.TeamMember) to List1.TeamMember (System.Collections.Generic.List1[TeamMember])

I’ve tried to implement this using expressions, Expression.ListInit. I’ve tried to implement this using ConvertUsing(), but I’m not finding the magic mapping config that achieves the required result.

Any idea/pointers? Many thanks.