如何在ASP.NET MVC中记录未处理的异常？

Public Class MvcApplication
    Inherits System.Web.HttpApplication

    Shared Sub RegisterRoutes(ByVal routes As RouteCollection)
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}")
        routes.MapRoute( _
            "Error",_
            "error.html",_
            New With {.controller = "Error",_
                      .action = "FriendlyError"} _
        )
        ...
        'other routes go here'
        ...
    End Sub

    Sub Application_Start()
        RegisterRoutes(RouteTable.Routes)
    End Sub

    Sub Application_Error(ByVal sender As Object,ByVal e As EventArgs)
        ...
        'code here logs the unhandled exception and sends an email alert'
        ...
        Server.Transfer("http://www.example.com/error.html")
    End Sub

End Class

但是Server.Transfer失败了：

Invalid path for child request 'http://www.example.com/error.html'. A virtual path is expected.

我该如何解决？或者,对我来说这是一个更好的方法吗？