asp net mvc dropdownlist get selected item in controller : i wante to get selected item from dropdownlist in controller 

Here is my code 


@using (Html.BeginForm()) {
    @Html.AntiForgeryToken()
 @Html.DropDownListFor(model => model.td_company_name, ViewBag.Listcompany as IEnumerable<SelectListItem>, new { @class = "form-control" })
}