how to retrieve the value from controller to view

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ASP.NET

Visual-Studio

hi,I am using asp.net MVC3.In my controller I have an action method like:

public ActionResult ListView(int id)
        {
           ViewBag.key = id;
            return View();
        }

In the view, how To pass this value dynamically in the url
I passed in the url like:
"/Home/GetDetails/id = " + '@ViewBag.key'
can i pass the id in this way?
I am getting an error like"The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method system.web.MVC.ActionRestult... ",can u tell me any other way to pass this id dynamically to the url.