Asp.Net MVC dropdownlist selected value dissappears

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ASP.NET

MVC

MVC4

DropDownList

I have two controllers and i am passing data one to another. When i pass data second controller to first controller dropdown's selected value disappears. I googled many hours but i failed.How can i keep selected ListItem when user clicks button and after page refreshes? Here is my codes:

First controller which has selectlist and controlling codes.

First Controller:

List<SelectListItem> list= new List<SelectListItem>
            {
            new SelectListItem {  Text = "--- Seçiniz----", Value = ""},
            new SelectListItem {  Text = "text1", Value = "11"},
            new SelectListItem { Text = "text2", Value = "12"},
            new SelectListItem {Text = "text3", Value = "13"},
            new SelectListItem {Text = "text4", Value = "14"},
            new SelectListItem { Text = "text5", Value = "15"}
            };

            if (TempData["daire"] != null)
            {

            int daire = Convert.ToInt32(TempData["daire"]);
            ViewBag.daire = new SelectList(list, "Value", "Text", TempData["daire"]);
            model= (folderBL.getAll().Where(k=>k.Id==daire)).ToList();
            }
           else
            {
            ViewBag.daire = new SelectList(list, "Value", "Text","");
            model= folderBL.getAll();
            }

Second controller, I get the daire value for my SelectList and send data to first controller.

public ActionResult SecondController(string daire)
       {
           TempData["daire"] = daire;
           return RedirectToAction("FirstController");
       }

And View.

@using (Html.BeginForm("SecondController","MyDashboard",FormMethod.Post))
          {
           @Html.DropDownList("daire", (SelectList)ViewBag.daire, new { id = "mydrop" })

           <td><input type="submit" value="Send" />
          }