We can use previous page values by using following method too...

in first page :
code markup Portion

   Public ReadOnly Property Tb01() As TextBox
       Get
           Return Tb01
       End Get
   End Property
  
   
HTML Markup Portion

        Enter :
        <asp:Textbox ID="Tb01" Runat="server" />
        <asp:Button ID="Btn_Post" Runat="server" Text="Nextpage.aspx"
         PostBackUrl="nextPage.aspx" />
       
  
in Second Page :
Code Markup
  
    Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        PrvPageValue.Text = PreviousPage.Tb01.Text
    End Sub

HTML Markup

        <asp:Label ID="PrvPageValue" Runat="server"></asp:Label>