How to check TempData value in my view after a form post?

Question

I fill my TempData from a FormCollection and then I try to check the value of my TempData in my view with MVC 4 but my if statement is

Answer 1

Try change TempData.Add("var", "abcd");

to

TempData['var'] = "abcd";

Update:

In My controller:

public ActionResult Index()
    {
        TempData["var"] = "abcd";
        return View();
    }

In my view:

// I cast to string to make sure it's checking for the correct TempData (string)
@if ((string)TempData["var"] == "abcd")
{
   Check
}
else
{
   @TempData["var"].ToString()
}