System.Web namespace

The System.Web namespace contains the important base level ingredients for ASP.NET applications. This namespace includes classes for our important primary objects.

This namespace has following built-in Objects :

  • Request
  • Response
  • Server
  • Application

And following important managing Classes for:

  • Web server and Client browser related information retrival
  • Configuring page caching
  • Tracing implementation
  • Cookies
System.Web namespace is an important base for Web Form user interface and web services.
Use of Built-in Objects like Request and Response are very common and widely used. We directly write them without creating objects as they are built-in objects.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication1
   public partial class WebForm1 : System.Web.UI.Page
         protected void Page_Load(object sender, EventArgs e)
                if (!IsPostBack)
                    if ( string.IsNullOrEmpty(Request.QueryString["queryStringName"]) )
                          if (Convert.ToString(Request.QueryString["queryStringName"]).Equals( "queryValue" )  )
                                  // do this
                                 // and do that
                                Response.Write("Response is built-in object under Syste.Web namespace.");