Create an asp.net page to show use of Web User Control
<%@ Page Language="C#"
AutoEventWireup="true"
CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register TagPrefix ="CS" TagName
="P1" Src ="~/WebUserControl.ascx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML
1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html
xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<CS:P1 ID="as" runat="server" />
</div>
</form>
</body>
</html>