BundleRegistration.cs

using System;
using System.Collections.Generic;
using System.Linq;
using YourMvcApp.Core.Bundlers;
using Microsoft.Web.Optimization;

namespace YourMvcApp.Core.Resources
{
    public class BundleRegistration
    {
        public static void RegisterBundles(BundleCollection bundles)
        {
            var jsBundleTypes = GetBundleTypes("YourMvcApp.Core.Resources.JSBundles");
            var cssBundleTypes = GetBundleTypes("YourMvcApp.Core.Resources.CSSBundles");

#if (DEBUG)
            var jsBundlerType = typeof(PlainJsBundler);
            var cssBundlerType = typeof(PlainCssBundler);
#else
            var jsBundlerType = typeof(JsMinify);
            var cssBundlerType = typeof(CssMinify);
#endif

            CreateAndAddBundles(jsBundleTypes, jsBundlerType, bundles);
            CreateAndAddBundles(cssBundleTypes, cssBundlerType, bundles);
        }

        private static IEnumerable<Type> GetBundleTypes(string @namespace)
        {
            return from type in typeof(BundleRegistration).Assembly.GetTypes()
                   where type.Namespace != null
                         && type.Namespace.StartsWith(@namespace)
                         && typeof (Bundle).IsAssignableFrom(type)
                   select type;
        }

        private static void CreateAndAddBundles(IEnumerable<Type> bundleTypes, Type bundlerType, BundleCollection bundles)
        {
            foreach (var type in bundleTypes)
            {
                var instance = (Bundle)Activator.CreateInstance(type, new[] { bundlerType });
                bundles.Add(instance);
            }
        }
    }
}