multi language --app_resources..dropdownlist box [englsih,hindi],asp.net 2.0

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C#

i m working with add_resources but not to trasfer all control to english to hindi......
i hve three lable one button and one dropdown list..

<table>
            <tr>
                <td colspan="3">
                    <asp:Label ID="Label_main" runat="server" Font-Names="Verdana" Text="Select Language"
                        Width="138px" meta:resourcekey="Label_mainResource1"></asp:Label></td>
            </tr>
            <tr>
                <td style="width: 100px">
                    <asp:Label ID="Label_lan" runat="server" Font-Names="Verdana" Text="Language" meta:resourcekey="Label_lanResource1"></asp:Label></td>
                <td colspan="2" style="width: 187px">
                    <asp:DropDownList ID="DropDownList_lang" runat="server" Width="131px"  AutoPostBack="True">
                    <asp:ListItem>Auto</asp:ListItem>
                    <asp:ListItem meta:resourcekey="ListItemResource1" Text="English" Value="en-US"></asp:ListItem>
                    <asp:ListItem meta:resourcekey="ListItemResource2" Text="Hindi" Value="hi-IN"></asp:ListItem>
                    <%--<asp:ListItem meta:resourcekey="ListItemResource3" Text="Gujarati" Value="gu-IN"></asp:ListItem>--%>
                    </asp:DropDownList></td>
            </tr>
            <tr>
                <td style="width: 100px">
                </td>
                <td colspan="2" style="width: 187px">
                    <asp:Button ID="Button1" runat="server" meta:resourcekey="Button1Resource1" Text="Change Language" OnClick="Button1_Click" /></td>
            </tr>
        </table>

i have try code this

string culture = Request.Form["DropDownList_lang"];
        if (string.IsNullOrEmpty(culture))
            culture = "Auto";
        //Use this
        UICulture = culture;
        Culture = culture;
        //OR This
        if (culture != "Auto")
        {
            System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo(culture);
            System.Threading.Thread.CurrentThread.CurrentCulture = ci;
            System.Threading.Thread.CurrentThread.CurrentUICulture = ci;
        }

        base.InitializeCulture();

my problem i not change effect when change in language in dropdownlist box ,,,english to hindhi
i try to make debug poin and i will get result like culture ="HINDI-INDIA"
but.my browser side values not pass to english to hindi.
i have add hindi language on my browser ...but problem is still.
please anybody help me.