<%@ MasterType VirtualPath="~/Demo.Master" %>

　　　　public string PageTitle
        {
            set {
                this.LabPageTitle.Text = value;
            }
        }

　　　　protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                this.Master.PageTitle = "Page頁修改母版頁控件的值";
            }
        }