<%--
    var selectedEvents = (from ctrl in Page.Controls
                  where ctrl.GetType() == typeof(CheckBox)
                  select ((CheckBox)ctrl).Text).ToList();
--%><asp:Panel runat="server" ID="pnlEvents" GroupingText="Events">
  <asp:Panel ID="Panel1" runat="server" GroupingText="Cubic">
    <asp:CheckBox runat="server" ID="cbx2x2" Text="2x2"/>
    <asp:CheckBox runat="server" ID="cbx3x3" Text="3x3"/>
    <asp:CheckBox runat="server" ID="cbx4x4" Text="4x4"/>
    <asp:CheckBox runat="server" ID="cbx5x5" Text="5x5"/>
    <asp:CheckBox runat="server" ID="cbx6x6" Text="6x6"/>
    <asp:CheckBox runat="server" ID="cbx7x7" Text="7x7"/>
    <br />
    <asp:CheckBox runat="server" ID="cbx3x3Oh" Text="3x3 OH"/>
  </asp:Panel>
  <asp:Panel ID="Panel2" runat="server" GroupingText="Blind">
    <asp:CheckBox runat="server" ID="cbxBld3x3" Text="3x3 BLD" />
    <asp:CheckBox runat="server" ID="cbxBld4x4" Text="4x4 BLD" />
    <asp:CheckBox runat="server" ID="cbxBld5x5" Text="5x5 BLD" />
  </asp:Panel>
  <asp:Panel ID="Panel3" runat="server" GroupingText="Other">
    <asp:CheckBox runat="server" ID="cbxSq1" Text="Square-1"/>
    <asp:CheckBox runat="server" ID="cbxMirrorBlocks" Text="Mirror Blocks"/>
    <asp:CheckBox runat="server" ID="cbxPyra" Text="Pyraminx"/>
    <asp:CheckBox runat="server" ID="cbxMega" Text="Megaminx"/>
  </asp:Panel>
  <asp:Panel ID="Panel4" runat="server" GroupingText="Flat">
    <asp:CheckBox runat="server" ID="cbxClock" Text="Clock"/>
    <asp:CheckBox runat="server" ID="cbxMagic" Text="Magic"/>
    <asp:CheckBox runat="server" ID="cbxMasterMagic" Text="Master Magic"/>
  </asp:Panel>
  <asp:Panel ID="Panel5" runat="server" GroupingText="Towers">
    <asp:CheckBox runat="server" ID="cbx2x2x3" Text="2x2x3"/>
    <asp:CheckBox runat="server" ID="cbx2x2x4" Text="2x2x4"/>
  </asp:Panel>
  <asp:Panel ID="Panel6" runat="server" GroupingText="Relays">
    <asp:CheckBox runat="server" ID="cbxRelay2to4" Text="2x2 - 4x4" />
    <asp:CheckBox runat="server" ID="cbxRelay2to5" Text="2x2 - 5x5"/>
  </asp:Panel>
</asp:Panel>