How to use DropShadowExtender in asp.net ajax

DropShadowExtender in asp.net ajax
UsingDropShadowExtender.aspx

<%@ Page Language="C#" AutoEventWireup="true" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>

<!DOCTYPE html>
<script runat="server">
    
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Ajax DropShadowExtender - How to use DropShadowExtender in asp.net ajax</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Crimson; font-style:italic;">Ajax Control Toolkit Example: Using DropShadowExtender</h2>
        <hr width="600" align="left" color="Pink" />
        <asp:ScriptManager 
            ID="ScriptManager1"
            runat="server"
            >
        </asp:ScriptManager>
        <cc1:DropShadowExtender 
            ID="DropShadowExtender1"
            runat="server"
            TargetControlID="Panel1"
            >
        </cc1:DropShadowExtender>
        <br /><br />
        <asp:Panel 
            ID="Panel1"
            runat="server"
            BackColor="Gray"
            ForeColor="Snow"
            Width="300"
            Height="150"
            HorizontalAlign="Center"
            >
            <br />
            <asp:TextBox 
                ID="TextBox1"
                runat="server"
                BackColor="Snow"
                ForeColor="OrangeRed"
                Text="email"
                >
            </asp:TextBox>
            <br /><br />
            <asp:Button 
                ID="Button1"
                runat="server"
                Font-Bold="true"
                ForeColor="SlateBlue"
                Height="40"
                Text="Subscribe Our Newsletter"
                />
        </asp:Panel>
    </div>
    </form>
</body>
</html>
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