Response.Redirect to same page without Page Refresh

hai all, 

i have problem with response.redirect. in my query i am used button inside updatepanel. if i click button i need same page reload, so i am used Response.redirect in code behind. i dont want entire page reload means postback, so i am used updatepanel. but if i am used updatepanel also the page is postbacked and page reloaded. i dont need reload flickering and page remains view. how to solve it if my question understand please give reply

<asp:UpdatePanel ID="Updatepanel1" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="true">
                                    <ContentTemplate>
<asp:Button ID="BtnClear" runat="server" Text="CLEAR" Width="113px" OnClick="BtnClear_Click" />
</ContentTemplate>
                                    <Triggers>
 <asp:AsyncPostBackTrigger ControlID="BtnClear" EventName="Click" />
 </Triggers>
                                </asp:UpdatePanel>

protected void BtnClear_Click(object sender, EventArgs e)
       {
           Response.Redirect("Url");   

       }