templated asp.net user control

i'm perplexing emanate user control allows users something following:

  <uc1:mycontrol id="controlthing" runat="server">

    <uc1:boundcolumn id="column1" column="name" runat="server" />
    <uc1:checkboxboundcolumn id="column2" column="selector" runat="server" />
    <uc1:boundcolumn id="column3" column="description" runat="server" />

     ...etc 

  </uc1:mycontrol>

there wholly certain controls i allow, offer fact have any type. i settlement xsd, nonetheless i'm wholly certain asp.net.

my asp.net spell sketch vacant right now.. any thoughts?