How to bind dyamic values in dropdown in MVC

public ActionResult TOURNAMENT_PROFILE()
        {
            objSQLHeplper = new SQLHelper();
            objCommonClass = new CommonClass();
            HttpCookie cookie = Request.Cookies["userInfo"];
            ObjTournamentDetail = new TournamentRegistration();
            
            if (Request.Cookies["UserName"] != null && Request.Cookies["UserPassword"] != null )
            {
                UserName = Request.Cookies["UserName"].Value.ToString();
                Password = Request.Cookies["UserPassword"].Value.ToString();
                ObjMenuName = objCommonClass.UserLoin(UserName, Password);
                if (ObjMenuName != null)
                {
                  
                    ObjMenuName = null;
                    dt= new DataTable();
                    dt = objCommonClass.GETCOUNTRY();
                    List<SelectListItem> OblListTournamentRegistration = new List<SelectListItem>();
                    foreach(DataRow dr in dt.Rows)
                    {
                        OblListTournamentRegistration.Add(new SelectListItem() { Text = dr["COUNTRY_NAME"].ToString(), Value = dr["COUNTRY_ID"].ToString() });
       
                    }
                    ViewBag.Country = OblListTournamentRegistration;

                    

                    if (Session["ErrorMessage"] != null)
                    {
                        ViewBag.ALertMessage = Session["ErrorMessage"].ToString();
                        ViewBag.JavaScriptFunction = string.Format("FailMessagePopup('{0}');", AlertMessage);
   
                    }
                    else if (Session["SuceessMessage"] != null)
                    {
                        ViewBag.ALertMessage = Session["SuceessMessage"].ToString();
                        ViewBag.JavaScriptFunction = string.Format("SuccessMessagePopup('{0}');", AlertMessage);
                    }
                    return View("TournamentRegistration");
                }
                else
                {
                    return RedirectToAction("MainPage", "Home");
                }
            }
            else
            {
                return RedirectToAction("MainPage", "Home");
            }
        }

@Html.DropDownListFor(model => model.COUNTRY_NAME, new SelectList(ViewBag.Country, "Value", "Text"), new { @class = "form-control glyphicon glyphicon-user", @value = "", placeholder = "Tournament Name", id = "txtTournamentName" })

public ActionResult TournamentRegistration(TournamentRegistration ObjTournamentRegistration)
        {
            
           try
            {

               
                MySqlConnection connection = new MySqlConnection(SQLHelper.ConnectionString);
                connection.Open();
                MySqlCommand cmd = new MySqlCommand("TOURNAMENT_REGISTRATION", connection);
                cmd.CommandType = CommandType.StoredProcedure;
	        cmd.Parameters.AddWithValue(
                cmd.Parameters.AddWithValue("@PI_COUNTRY", ObjTournamentRegistration.COUNTRY_ID);
                .ToString());
                cmd.ExecuteNonQuery();               
                TournamentLogo=null;   
                Session["SuceessMessage"] = "Sucessfull Registered";
                
                return RedirectToAction("TOURNAMENT_PROFILE", "MainPageMenuBar");
            }
            catch (Exception ex)
            {
                Session["ErrorMessage"] = "Something Went Wrong";
                return RedirectToAction("TOURNAMENT_PROFILE", "MainPageMenuBar");
            }
        }
}