<select id="idGoods" class="form-control" style="width:570px;"></select>

<script type="text/javascript" language="javascript">
    $(document).ready(function () {
       

        $('#idGoods').select2({
            placeholder: 'Введите название товара...',
            minimumInputLength: 3,
            ajax: {
                url: '@Url.Action("searchGoods", "Admin")',
                dataType: 'json',
                data: function (term, page) {
                    return {
                        searchTerm: term
                    };
                },
                results: function (data, page) {
                    return { results: data };
                }
            }
        });
    });
</script>

public JsonResult searchGoods(string searchTerm)
        {
            Goods _g = new Goods();
            
            return Json(_g.searchGoods(searchTerm), JsonRequestBehavior.AllowGet);
        }

 public class Goods
    {
        public string id { get; set; }
        public string name { get; set; }
   }


public List<Goods> searchGoods(string search)
        {
            using (var db = new iMagazine())
            {
                var res =
                    from itemA in db.list_Goods
                    select new
                    {
                        itemA.id,
                        itemA.name
                    };

                res = res.Where(repository => repository.name.Contains(search));
                res = res.OrderBy(repository => repository.name);

                List<Goods> _repos = new List<Goods>();
                foreach (var pair in res)
                {
                    _repos.Add(new Goods
                    {
                        id = pair.id,
                        name = pair.name
                    });
                }

                return _repos;

            }
        }