How to enable gzip compression in asp.net mvc

How to enable gzip compression in asp.net mvc

1) Code in Global Asax

add folowing name spaces

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
using System.IO;
using System.IO.Compression;
using System.Threading;

        void Application_PreRequestHandlerExecute(object sender, EventArgs e)
        {
            var app = sender as HttpApplication;
            if (app != null)
            {
                string acceptEncoding = app.Request.Headers["Accept-Encoding"];
                Stream prevUncompressedStream = app.Response.Filter;

                if (!(app.Context.CurrentHandler is Page ||
                      app.Context.CurrentHandler.GetType().Name == "SyncSessionlessHandler") ||
                    app.Request["HTTP_X_MICROSOFTAJAX"] != null)
                    return;

                if (string.IsNullOrEmpty(acceptEncoding))
                    return;

                acceptEncoding = acceptEncoding.ToLower();

                if (acceptEncoding.Contains("deflate") || acceptEncoding == "*")
                {
                    // defalte
                    app.Response.Filter = new DeflateStream(prevUncompressedStream,
                        CompressionMode.Compress);
                    app.Response.AppendHeader("Content-Encoding", "deflate");
                }
                else if (acceptEncoding.Contains("gzip"))
                {
                    // gzip
                    app.Response.Filter = new GZipStream(prevUncompressedStream,
                        CompressionMode.Compress);
                    app.Response.AppendHeader("Content-Encoding", "gzip");
                }
            }
        }

2- Code add in web.config

<system.webServer>
    <httpCompression directory="%SystemDrive%\inetpub\temp\IIS Temporary Compressed Files">
      <scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll" />
      <dynamicTypes>
        <add mimeType="text/*" enabled="true" />
        <add mimeType="message/*" enabled="true" />
        <add mimeType="application/x-javascript" enabled="true" />
        <add mimeType="*/*" enabled="false" />
      </dynamicTypes>
      <staticTypes>
        <add mimeType="text/*" enabled="true" />
        <add mimeType="message/*" enabled="true" />
        <add mimeType="application/javascript" enabled="true" />
        <add mimeType="*/*" enabled="false" />
      </staticTypes>
    </httpCompression>
  </system.webServer>