Skapa Virtual Directory i ASP.NET

Går det att skapa ett virtual directory från en sida i asp.net?
har hittat denna kod men det funkar inte riktigt får felmeddelande att directoryEntry inte är definerad

Private Sub CreateVirtualDir(ByVal WebSite As String, ByVal AppName As String, ByVal Path As String)

        Dim IISSchema As New System.DirectoryServices.DirectoryEntry("IIS://" & WebSite & "/Schema/AppIsolated")
        Dim CanCreate As Boolean = Not IISSchema.Properties("Syntax").Value.ToString.ToUpper() = "BOOLEAN"
        IISSchema.Dispose()

        If CanCreate Then
            Dim PathCreated As Boolean

            Try
                Dim IISAdmin As New System.DirectoryServices.DirectoryEntry("IIS://" & WebSite & "/W3SVC/1/Root")

                'make sure folder exists
                If Not System.IO.Directory.Exists(Path) Then
                    System.IO.Directory.CreateDirectory(Path)
                    PathCreated = True
                End If

                'If the virtual directory already exists then delete it
                For Each VD As System.DirectoryServices.DirectoryEntry In IISAdmin.Children
                    If VD.Name = AppName Then
                        IISAdmin.Invoke("Delete", New String() {VD.SchemaClassName, AppName})
                        IISAdmin.CommitChanges()
                        Exit For
                    End If
                Next VD

                'Create and setup new virtual directory
                Dim VDir As System.DirectoryServices.DirectoryEntry = IISAdmin.Children.Add(AppName, "IIsWebVirtualDir")
                VDir.Properties("Path").Item(0) = Path
                VDir.Properties("AppFriendlyName").Item(0) = AppName
                VDir.Properties("EnableDirBrowsing").Item(0) = False
                VDir.Properties("AccessRead").Item(0) = True
                VDir.Properties("AccessExecute").Item(0) = True
                VDir.Properties("AccessWrite").Item(0) = False
                VDir.Properties("AccessScript").Item(0) = True
                VDir.Properties("AuthNTLM").Item(0) = True
                VDir.Properties("EnableDefaultDoc").Item(0) = True
                VDir.Properties("DefaultDoc").Item(0) = "default.htm,default.aspx,default.asp"
                VDir.Properties("AspEnableParentPaths").Item(0) = True
                VDir.CommitChanges()

                'the following are acceptable params
                'INPROC = 0
                'OUTPROC = 1
                'POOLED = 2
                VDir.Invoke("AppCreate", 1)

            Catch Ex As Exception
                If PathCreated Then
                    System.IO.Directory.Delete(Path)
                End If
                Throw Ex
            End Try
        End If
    End Sub