how to pass dataset from model to view in mvc2.0

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C#

C#4.0

MVC

I am doing my 1st project in MVC2.0 and stuck in MODEL while sending dataset from model to view. Please some one guide me. This is my view



VIEW CODE.
<div style="width:98%; text-align:center; padding-top:5%">

<label for="UserName">id:</label> <%= Html.TextBox("MUunit") %> <input type="submit" value="Scan" />

<%--<%= Html.Encode(ViewData["message"]) %>--%>
</div>

<% } %>
When button is clicked the value entered in textbox eg:"12345" comes to controller

CONTROLLER CODE:

Un ut = new Un();
public ActionResult Index()
{
return View();
}

[HttpPost]

public ActionResult Index(string textbox)
{
textbox = Request.Form["MUunit"];
return View(Details(textbox));
}
the value passed to MODEL. The model connected to database and return DATASET.

public class Un {
public DataSet Details(string txbox)
{

DataSet objDataset = new DataSet();

objDataset = Details(txbox);

return objDataset;
}
}
It return dataset. how to pass dataset to view??