I want to add a confirmation message on button click , but btnUpdateEmail_Click
not working now.
<asp:Button ID="btnSave" runat="server" UseSubmitBehavior="false"
Text="Update Import Email" ValidationGroup="groupValidation"
OnClientClick="return confirm('Are you sure you want to update
Import Email?');" OnClick="btnUpdateEmail_Click"
CssClass="btn-danger" Height="46px" Width="237px"
Font-Bold="true" />