I have defined an area (Admin) in my ASP.NET MVC 3 application, created _ViewStart.cshtml in that area and addedLayout = "~/Views/Shared/_Layout.cshtml"; to it to have a unified site layout.  
I also added the following code to _Layout.cshtml:  
if (HttpContext.Current.User.IsInRole("Admin"))
{
    <li>@Html.ActionLink("Items List", "Index", "Items", new { area = "Admin" }, null)</li>
}
The Admin area is displayed properly having _Layout.cshtml as its layout. But all the navigation links in the page now point to Admin subfolder.  
For example in my layout I have <li>@Html.ActionLink("About Us", "About", "Home")</li>,  which points to Mysite/Home/About. But after clicking the admin link, the "About Us" link points to /Admin/Home/About.  
What should I do to have _Layout.cshtml links pointing to the right address?
Thanks.
 
    