gistfile1.cs

public static IMappingExpression<Procurement, ProcurementViewModel> CreateDestinationMap()
{
    return Mapper.CreateMap<Procurement, ProcurementViewModel>()
        .ForMember(dest => dest.Id, opt => opt.MapFrom(p => p.Procurement_ID))
        .ForMember(dest => dest.Donors, 
                   opt => opt.MapFrom(p =>
                                        Mapper.Map<IEnumerable<Donor>, IEnumerable<ProcurementDonorViewModel>>(p.ProcurementDonors.Select(x => x.Donor))
                                      ));
}