Basepage类与.net2.0中母版页有什么区别?详解并修改这段代码．(分不够再加,只求彻底弄清此类问题.)BasePage主要用途，优点？？？资源利用问题？？？

Public Class BasePage



    Inherits System.Web.UI.Page



        Public Shared myBoard As Board = Nothing



        Protected Overrides Sub OnPreInit(ByVal e As System.EventArgs)



            myBoard = BoardBL.GetBoardByID(HttpContext.Current.Request.QueryString("boardid"))



            MyBase.OnPreInit(e)



       End Sub



End Class

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 

    Me.Title = BasePage.myBoard.Name



End Sub



Instead of:



Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 

    Dim myBoard As Board = BoardBL.GetBoardByID(HttpContext.Current.Request.QueryString("boardid"))



    Me.Title = myBoard.Name



End Sub