how to Create dynamically TabPanel

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ASP.NET

Ajax

Hi every one

Requirement I want to create Tabpanels dynamically i used Below Code to achive it

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim Temptab As AjaxControlToolkit.TabPanel

    Dim i As Integer = 0

    Dim lbl As Label
    For i = 1 To 5
        lbl = New Label
        lbl.Text = "Hi i m Tab no : " & i + 1

        Temptab = New AjaxControlToolkit.TabPanel()
        Temptab.ID = "NewTab" & TabContainer1.Tabs.Count + 1
        Temptab.HeaderText = "New Tab " & TabContainer1.Tabs.Count + 1
        Temptab.Controls.Add(lbl)

        TabContainer1.Tabs.Add(Temptab)


End Sub

this Button1 is inside the Update panel and Tab container too

Problem When ever i click Button one , this code adds only one tabpanel, on second click previously created Tabpanel goes off,

i want something like Multiple pages [aspx forms] should be opened in multiple tabs[Not Browser Tabs my tab controller tab],

I know Dude to post back these controls are losing but i cant create all dynamically created Controls after every postback cause i will get huge amount of controls to create and Time Consuming.

Do we have any alternative Solution or some other control or anything to achieve my functionality

Thanks In Advance.