gistfile1.cs

//Take this

        public ActionResult Logins()
        {
            var mapped = _repository
                .Query(new GetLoginHistoryAndUser())
                .AutoMap<LoginHistory, LoginHistoryDisplay>()
                .ToList();

            return View(new LoginHistoryViewModel { LoginHistory = mapped });
        }

//with this

        public static IEnumerable<Y> AutoMap<T, Y>(this IEnumerable<T> list)
        {
            return list.Select(x => Mapper.Map<T, Y>(x));
        }

//Why can't i write this (omitting the first type in the AutoMap method)

        public ActionResult Logins()
        {
            var mapped = _repository
                .Query(new GetLoginHistoryAndUser())
                .AutoMap<LoginHistoryDisplay>()
                .ToList();

            return View(new LoginHistoryViewModel { LoginHistory = mapped });
        }