As a solution, I wrote a demo for your reference,
Maser Page:
<%@ Master Language="C#" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
string strTitle = "ASP.NET";
public string TheTitle
{
get
{
return strTitle;
}
set
{
strTitle = value;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Demo</title>
<asp:ContentPlaceHolder id="head" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
</div>
</form>
</body>
</html>
Page:
<%@ Page Language="C#" MasterPageFile="~/MasterPage/MasterType20081211.master" Title="" %>
<%@ MasterType VirtualPath="~/MasterPage/MasterType20081211.master" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
Response.Write(Master.TheTitle);
Master.TheTitle = "Microsoft";
Response.Write("<br />");
Response.Write(Master.TheTitle);
}
</script>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
</asp:Content>