Demonstrates how to remove "home" from routing without needing to explicitly map other controllers

RouteMapsSansHome.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace MyNamespace
{
    public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
            routes.IgnoreRoute("content/{*pathInfo}");
            routes.IgnoreRoute("{*favicon}", new { favicon = @"(.*/)?favicon.ico(/.*)?" });

            routes.LowercaseUrls = true;


            routes.MapRoute(
                name: "DefaultSansHome",
                url: "{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional },
                constraints: new { controller = new RootRouteConstraint<Controllers.HomeController>() }
            );

            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { action = "Index", id = UrlParameter.Optional }
            );
        }
    }
    
    
    public class RootRouteConstraint<T> : IRouteConstraint
    {
        public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
        {
            var rootMethodNames = typeof(T).GetMethods().Select(x => x.Name);
            return values["action"] == null ? false : rootMethodNames.Any(m => m.Equals(values["action"].ToString(), System.StringComparison.OrdinalIgnoreCase));
        }
    }
    
}