HtmlFieldPrefix.cs

@using (Html.BeginForm("PostData", "Home", FormMethod.Post, new { id = "simpleForm" }))
{
    ViewContext.ViewData.TemplateInfo.HtmlFieldPrefix = "list[0]";
    <input type="hidden" name="list.Index" value="0" />
    @Html.TextBoxFor(x => x.Name)
    @Html.TextBoxFor(x => x.Description)

    ViewContext.ViewData.TemplateInfo.HtmlFieldPrefix = "list[1]";
    <input type="hidden" name="list.Index" value="1" />
    @Html.TextBoxFor(x => x.Name)
    @Html.TextBoxFor(x => x.Description)

    <input type="submit" value="submit" id="btnSubmit" />
}