How to use Tempdata on refresh page also?

Question

// Took result from one ActionMethod and kept it in TempData

 

// THIS IS Controller

 

int result = objDB.InsertEmployementApplication(OM);

TempData.Keep("result");

//Action Method which gets Value is Index

 

public ActionResult Index()

{

Response.Write("result is" + TempData.Keep("result") + " Thankssss");

return View("Index");

}

 

// THE ERROR IS (Error 1 Operator '+' cannot be applied to operands of type 'string' and 'void' )