asp.net動态設定masterpage實作換膚

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

    public partial class Default : BasePage
    {
        protected override void InitializePage()
        {
            //設定不同的MasterPageFile實作換膚
            this.MasterPageFile = "~/skins/default/Default.master";
        }

        protected void Page_Load(object sender, EventArgs e)
        {

            //擷取masterpage中的ContentPlaceHolder
            ContentPlaceHolder ContentPlaceHolder1 = Master.FindControl("ContentPlaceHolder1") as ContentPlaceHolder;

            //添加控件到ContentPlaceHolder
            LiteralControl lit = new LiteralControl();
            lit.Text = "test";
            ContentPlaceHolder1.Controls.Add(lit);

        }
    }