asp.net-mvc – 表达式树可能不包含动态操作 – mvc

@model Tuple<IEnumerable<dynamic>,IEnumerable<dynamic>,IEnumerable<dynamic>>

@(Html.Telerik().Grid(Model.Item3)
    .Name("Grid")
    .DataKeys(keys => keys.Add(c => c.Id))
)

我得到错误：表达式树可能不包含动态操作.

这是控制器代码：

FirstClass firstC= new FirstClass ();
IEnumerable<dynamic> first= firstC.All();

SecondClass secondC= new SecondClass ();
IEnumerable<dynamic> second= secondC.All();

ThirdClass thirdc = new ThirdClass ();
IEnumerable<dynamic> third= thirdc .All();

Tuple<IEnumerable<dynamic>,IEnumerable<dynamic>> result =
            new Tuple<IEnumerable<dynamic>,IEnumerable<dynamic>>(firstC,secondC,thirdc );
return View(result);

怎么解决这个？