Bagaimana untuk Menambah Kelas 'Aktif' dengan Cekap pada Html.ActionLink ASP.NET MVC untuk Navigasi Bootstrap?

<ul class="nav navbar-nav">
    <li class="active">@Html.ActionLink("Home", "Index", "Home")</li>
    <li>@Html.ActionLink("About", "About", "Home")</li>
    <li>@Html.ActionLink("Contact", "Contact", "Home")</li>
</ul>

<ul class="nav navbar-nav">
    <li class="@(ViewContext.RouteData.Values["Action"].ToString() == "Index" ? "active" : "")">@Html.ActionLink("Home", "Index", "Home")</li>
    <li class="@(ViewContext.RouteData.Values["Action"].ToString() == "About" ? "active" : "")">@Html.ActionLink("About", "About", "Home")</li>
    <li class="@(ViewContext.RouteData.Values["Action"].ToString() == "Contact" ? "active" : "")">@Html.ActionLink("Contact", "Contact", "Home")</li>
</ul>

public static string IsSelected(this HtmlHelper html, string controllers = "", string actions = "", string cssClass = "selected")
{
    var viewContext = html.ViewContext;
    var isChildAction = viewContext.Controller.ControllerContext.IsChildAction;

    if (isChildAction)
        viewContext = html.ViewContext.ParentActionViewContext;

    var routeValues = viewContext.RouteData.Values;
    var currentAction = routeValues["action"].ToString();
    var currentController = routeValues["controller"].ToString();

    var acceptedActions = actions.Trim().Split(',').Distinct().ToArray();
    var acceptedControllers = controllers.Trim().Split(',').Distinct().ToArray();

    return (acceptedActions.Contains(currentAction) && acceptedControllers.Contains(currentController)) ? cssClass : "";
}

<ul>
    <li class="@Html.IsSelected(actions: "Home", controllers: "Default")">
        <a href="@Url.Action("Home", "Default")">Home</a>
    </li>
    <li class="@Html.IsSelected(actions: "List,Detail", controllers: "Default")">
        <a href="@Url.Action("List", "Default")">List</a>
    </li>
</ul>