在asp.net 2.0里，可以支持動態訪問meta 標記了，比如可以動態增加關鍵字了
PRivate Sub CreateMetaTags()

     Dim hm As New HtmlMeta()

    Dim head As HtmlHead = CType(Page.Header, HtmlHead)

    hm.Name = "KeyWords"

    hm.Content = "VB.Net, VB.NET, .NET"

    head.Controls.Add(hm)

End Sub