Section not defined In Index.cshtml in asp.net mvc?

Question

In MVC get an error:

 

Section not defined: "alertmethod"

 

I already define that method in Index.cshtml 

 

_Layout.cshtml

 

@RenderSection("alertmethod")   // I define this method in index.cshtml that's yI m using rendersection?? 

<div class="container body-content"> @RenderBody() @RenderSection("alertmethod") <footer> </footer> </div>

HomeController

 

        public ActionResult create()
        {
            return View();
        }

        [HttpPost]
        public ActionResult create(studentmvcmodel stud)
        {
            ViewBag.message = "data inserted successfully";
            return RedirectToAction("Index");
        }

 

 

Index.cshtml

 How to resolve this issue??