dropdown and redirect

I tried to search the blogs but I cant find the exact scenario.Here is what I am trying to do. select a value from dropdown and move to that page.
1.aspx
 <asp:DropDownList  ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" AutoPostBack="True" EnableViewState='True'>
               <asp:ListItem>a</asp:ListItem>
                    <asp:ListItem>b</asp:ListItem>
                    <asp:ListItem>c</asp:ListItem>
                    <asp:ListItem> ...