Попытка с помощью метода 'DynamicClass.lambda_method(System.Runtime.Услуги компиляторов.Закрытие) для доступа к системе типа '.В LINQ.OrderedEnumerable`2<решение.Области.Администратор.Модели.ServiceModel,System.Int32>' не удалось.

Attempt by method 'DynamicClass.lambda_method(System.Runtime.CompilerServices.Closure)' to access type 'System.Linq.OrderedEnumerable`2<Solution.Areas.Admin.Models.ServiceModel,System.Int32>' failed.

public ActionResult Index(string Search_name, int? page, string sortOrder)
       {
ViewBag.orderbySortParm = sortOrder == "orderby" ? "orderby_desc" : "orderby";
switch (sortOrder)
            {
                case "orderby":
                    var sorted = model.serviceList.OrderBy(a => a.DisplayOrder);
                    model.pageServiceList = sorted.ToPagedList(currentPageIndex, pageSize);
                    break;
                case "orderby_desc":
                    var sortedesc = model.serviceList.OrderByDescending(a => a.DisplayOrder);
                    model.pageServiceList = sortedesc.ToPagedList(currentPageIndex, pageSize);
                    break;
            }
}

<th>
                    <a href="@Url.Action("Index", "Service", new { sortOrder = ViewBag.orderbySortParm })">Display Order</a>
                </th>