Contenido del archivo global.asax para el motor de vistas con soporte para temas

Global.asax.cs

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
using MvcThemeable.Infraestructura;

namespace MvcThemeable
{
    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            if (!String.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["Tema"]))
            {
                var tema = ConfigurationManager.AppSettings["Tema"];
                ViewEngines.Engines.Insert(0,new ThemeViewEngine(tema));
            }
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
        }
    }
}