You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version  3.5.  Your application has a user control named UserCtrl.ascx. You write the following code fragment to create a Web page named Default.aspx. You need to dynamically add the UserCtrl.ascx control between the lblHeader and lblFooter Label | English | Chinese | Japan | Korean | - 11 - Test Information Co., Ltd. All rights reserved. controls.  What should you do?（）

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