<%@ Control Language="C#" AutoEventWireup="true" CodeFile="ChildControl.ascx.cs" Inherits="ChildControl" ClassName="ChildControl"%>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<br />
<asp:Button ID="btnAlfa" runat="server" Text="Alfa" OnClick="btnAlfa_Click" />
<asp:Button ID="btnBravo"
    runat="server" Text="Bravo" OnClick="btnBravo_Click" />