Unable to Get My View Data into Controller when page submitted I am using Tuple modal

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C#3.5

Razor

EF5.0

MVC5

@model Tuple<ilist><models.getsubjects_result>, IList<models.getenteredmarkslist_result>
// This data belongs to GetEnteredMarksList_Result modal

@using (Html.BeginForm("SaveMarks", "College", FormMethod.Post))
{

@for (int i =1; i < Model.Item2.Count; i++)
{

}

@i	@Model.Item2[i].htno @Html.HiddenFor(m=>m.Item2[i].htno)	@Html.EditorFor(m =>m.Item2[i].marks, new {@maxlength="3",@style="width:75px;"})	@Html.LabelFor(m=>m.Item2[i].sname )
<input type="submit" value=" SAVE " onclick='confirm("Are you sure you want save?")' class="btn-success" style="height:40px;"/>

At Controller Side :

[HttpPost]
public ActionResult SaveMarks([Bind(Prefix = "Item2")] IList<getpreparedmarkslist_result> tobj)
{

// here I am Getting null in tobj ??

///How should i get all rows of Data into Controller Please Help out

}