By using these line of code we can show checkbox as a list

<div style="border: thin solid; overflow: auto; width: 120px; height: 100px">
 <asp:CheckBoxList ID="CheckBoxList1" runat="server">
 <asp:ListItem Value="1">Noida</asp:ListItem>
<asp:ListItem Value="2">Delhi</asp:ListItem>
<asp:ListItem Value="3">Gurgaon</asp:ListItem>
<asp:ListItem Value="4">Chandigarh</asp:ListItem>
</asp:CheckBoxList>
 </div>

ChkList.PNG

If u want to perform some operation on this list u can do like as...

foreach (ListItem lst in CheckBoxList1.Items)
{
if (lst.Selected)
{
Response.Write("Select CheckBox Text=" + lst.Text + " & Id=" + lst.Value + "<br>");
}
}