public ActionResult Day(){ var q = from o in _db.Ordersgroup o by o.OrderStateinto gselect new {g.Key, Count = g.Sum(o => o.Id)};return View(q);}以是有控制器中的代碼，視圖層： @foreach (var item in Model)     {          <td>@item.Key</td>      }異常：object”未包含“Key”的定義，但是直接顯示@item的話會顯示{Key=ABC,Count=12}.求解