Custom Server Control like Menu with collection property

Hi everyone,
could you please help me how to allow my control to accept collection property like for example ASP Menu control:
<asp:Menu runat="server"> <Items> <asp:MenuItem /> <asp:MenuItem /> <asp:MenuItem /> </Items> </asp:Menu>


Could you recommend me some tutorial?
I dont know how is this called I cand find anything.
Thank you for your replies.
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