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

public partial class MasterPage : System.Web.UI.MasterPage
{
    string m_name;

    public string Name
    {
        get
        {
            return m_name;
        }
    }

    protected void Page_Load(object sender, EventArgs e)
    {

    }
}

<%@ MasterType VirtualPath="~/MasterPage.master" %>

txtName.Text = Master.Name;