I found the example http://demos.telerik.com/aspnet-ajax/tabstrip/examples/applicationscenarios/loadondemand/defaultcs.aspx
very useful as start.
I have a slightly differences in the implementation approach, which is : my tab that will load other user controls on demand is itself in a usercontrol that loads dynamically.
I don't know why the if (!Page.IsPostBack) is always "false", it never fires !! unless I take out the "!".
Is it correct that the whole pages will be loaded every time the control is loaded !!
which is against the approach (load on demand)
How I can resolve this ...