IIS combine and minify assets

Suppose we have simple site with /css and /js folders which must be minified and combined.

Create empty web forms web site and install Microsoft ASP.NET Web Optimization Framework via NuGet package manager.

Actually all you need from this package is: Microsoft.AspNet.Web.Optimization.WebForms.dll, System.Web.Optimization.dll and WebGrease.dll.

First two needed for bundles to work, last one need for minification.

Add Global.asax to your project with content like this:

<%@ Application Language="C#" %>
<%@ Import Namespace="System.Web.Optimization" %>

<script runat="server">
    void Application_Start(object sender, EventArgs e)
        BundleTable.EnableOptimizations = true; // this will override Web.config/configuration/system.web/compilation[@debug=true]

        // Example of adding script bundle
        BundleTable.Bundles.Add(new ScriptBundle("~/bundles/js/all").Include(

        // Example of adding styles bundle (can be also done via Bundle.config)
        BundleTable.Bundles.Add(new StyleBundle("~/bundles/css/all").Include(

Add Bundle.config to your project (if needed):

<?xml version="1.0" encoding="utf-8" ?>
<bundles version="1.0">
    <!-- Example of styles bundle -->
    <styleBundle path="~/bundles/css/config">
    <include path="~/css/a.css" />
    <include path="~/css/b.css" />
    <!-- Scripts bundles can not be done this way -->

Make your Web.config to look like this:

<?xml version="1.0"?>
    <!-- debug="true" turns off bundles - can be overwritten in Global.asax -->
    <compilation debug="false" targetFramework="4.0"/>
    <httpRuntime targetFramework="4.0"/>

Restart your site, and thats all, now you can access your bundles by urls: /bundles/js/all, /bundles/css/all, /bundles/css/config

There is much more can be done with bundles, but in my case i need only such simple example

On IIS 7 microsoft.web.infrastructure.dll also needed for proper work.