CustomSiteRoutes.cs

  public class CustomSiteRoutes : RouteBase
    {
    
        public override RouteData GetRouteData(HttpContextBase httpContext)
        {
            if (httpContext.Request.Url.Host.Contains("site2.com"))
            {
                string url = httpContext.Request.AppRelativeCurrentExecutionFilePath;

                string controllername = "Home";
                string actionname = "Index";
                
                // let's mess with the URLs - if not in this list, custom sites won't
                // handle them differently than Athletix.us
                var urlsToHandle = new List<string>
                                       {
                                           "~/",
                                           "~/about",
                                           "~/contact",
                                           "~/join"
                                       };

                if (urlsToHandle.Contains(url))
                {
                    var routeHandler = new MvcRouteHandler();
                    var currentRoute = new Route("{controller}/{action}", routeHandler);
                    var routeData = new RouteData(currentRoute, routeHandler);

                    // determine, beased on the URL, which controller / action to send the request to
                    switch (url)
                    {
                        case "~/":
                            controllername = "CustomSite";
                            actionname = "Home";
                            break;
                        case "~/about":
                            controllername = "CustomSite";
                            actionname = "Page";
                            routeData.Values.Add("location", Context.Current.CustomSite.AboutUsPageSnippet);
                            break;
                        case "~/contact":
                            controllername = "CustomSite";
                            actionname = "Page";
                            routeData.Values.Add("location", Context.Current.CustomSite.ContactUsPageSnippet);
                            break;
                        case "~/join":
                            controllername = "CustomSite";
                            actionname = "Page";
                            routeData.Values.Add("location", Context.Current.CustomSite.RegisterPageSnippet);
                            break;
                    }

                    // controller / action set dynamically
                    routeData.Values["controller"] = controllername;
                    routeData.Values.Add("action", actionname);
                   
                    // return the route, or null to have it passed to the next routing engine in the list
                    return routeData;
                }
            }

            return null;
        }

        public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values)
        {
            //implement this to return url's for routes, or null to just pass it on
            return null;
        }
    }