void Main()
{
    AutoMapper.Mapper.CreateMap<Contact, KeyValuePair<Guid, string>>()
        .ConstructUsing(x => new KeyValuePair<Guid, string>(x.Id, x.FullName));
 
    //var contacts = ContactRepository.GetAll(); // Returns IList<Contact>
    var contacts = new List<Contact> {
        new Contact { Id = Guid.NewGuid(), FullName = "Joe Bob" },
        new Contact { Id = Guid.NewGuid(), FullName = "Sally Jones" },
    };