Demonstrates how to use BundleTransformer in a C# ASP.NET MVC web application.

BundleConfig.cs

using System.Web;
using System.Web.Optimization;
using BundleTransformer.Core.Transformers;

namespace Project.App_Start {
    public class BundleConfig {
        public static void RegisterBundles(BundleCollection bundles) {
            var styles = new Bundle("~/bundles/stylesheets")
            .Include(
                "~/Assets/Styles/*.css",
                "~/Assets/Styles/application.less"
            );
            styles.Transforms.Add(new CssTransformer());
            bundles.Add(styles);

            var scripts = new ScriptBundle("~/bundles/javascripts")
            .Include(
                "~/Assets/Scripts/*.js",
                "~/Assets/Scripts/*.coffee"
            );
            scripts.Transforms.Add(new JsTransformer());
            bundles.Add(scripts);
        }
    }
}

Global.asax

using Project.App_Start;
using System.Web.Optimization;

protected void Application_Start() {
    BundleConfig.RegisterBundles(BundleTable.Bundles);
}

Nested.Master

<%: System.Web.Optimization.Styles.Render("~/bundles/stylesheets") %>
<%: System.Web.Optimization.Scripts.Render("~/bundles/javascripts") %>

Package Manager

Install-Package BundleTransformer.Less
Install-Package BundleTransformer.SassAndScss
Install-Package BundleTransformer.CoffeeScript
Install-Package JavaScriptEngineSwitcher.V8

Web.config

<pages>
  <namespaces>
    <add namespace="System.Web.Optimization" />
  </namespaces>
</pages>
    
<bundleTransformer xmlns="http://tempuri.org/BundleTransformer.Configuration.xsd">
    <core>
        <css>
            <minifiers>
                <add name="NullMinifier" type="BundleTransformer.Core.Minifiers.NullMinifier, BundleTransformer.Core" />
            </minifiers>
            <translators>
                <add name="NullTranslator" type="BundleTransformer.Core.Translators.NullTranslator, BundleTransformer.Core" enabled="false" />
                <add name="LessTranslator" type="BundleTransformer.Less.Translators.LessTranslator, BundleTransformer.Less" />
                <add name="SassAndScssTranslator" type="BundleTransformer.SassAndScss.Translators.SassAndScssTranslator, BundleTransformer.SassAndScss" />
            </translators>
        </css>
        <js>
            <minifiers>
                <add name="NullMinifier" type="BundleTransformer.Core.Minifiers.NullMinifier, BundleTransformer.Core" />
            </minifiers>
            <translators>
                <add name="NullTranslator" type="BundleTransformer.Core.Translators.NullTranslator, BundleTransformer.Core" enabled="false" />
                <add name="CoffeeScriptTranslator" type="BundleTransformer.CoffeeScript.Translators.CoffeeScriptTranslator, BundleTransformer.CoffeeScript" />
            </translators>
        </js>
    </core>
    <less>
        <jsEngine name="V8JsEngine" />
    </less>
    <coffeeScript>
        <jsEngine name="V8JsEngine" />
    </coffeeScript>
</bundleTransformer>
<jsEngineSwitcher xmlns="http://tempuri.org/JavaScriptEngineSwitcher.Configuration.xsd">
    <core>
        <engines>
            <add name="V8JsEngine" type="JavaScriptEngineSwitcher.V8.V8JsEngine, JavaScriptEngineSwitcher.V8" />
        </engines>
    </core>
</jsEngineSwitcher>