Dynamic change title & meta page on ASP

By attributes

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Title="MyTitle" Inherits="ASP1._Default" MasterPageFile="~/MasterPage.Master" %>

Programmatically

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace ASP1
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Page.Title = "Hello World";

            // Programmatically add a <meta> element to the Header
            HtmlMeta keywords = new HtmlMeta();
            keywords.Name = "keywords";           
            keywords.Content = "master page,asp.net,tutorial";
            Page.Header.Controls.Add(keywords);
        }
    }
}