select only i checkbox in asp.net

i have checkbox on my page i want user to select only 1 checkbox , if user selects second checkbox ,1st will be deselected
<asp:CheckBoxList ID="CheckBoxList1" runat="server">
<asp:ListItem Value="Structures" >Structures</asp:ListItem>
<asp:ListItem Value="Interiors">Interiors</asp:ListItem>
<asp:ListItem Value="Furnitures">Furnitures</asp:ListItem>
<asp:ListItem Value="Cooling">Cooling</asp:ListItem>


</asp:CheckBoxList>
plz suggest
thnx
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