动态注册每个域（多租户）的路由

public class MyRoute : RouteBase
{
    private readonly RoutesRepository _routesRepository;

    public MyRoute(RoutesRepository routesRepo)
    {
        _routesRepository = routesRepo;
    }

    #region Overrides of RouteBase

    public override RouteData GetRouteData(HttpContextBase httpContext)
    {
        //Here you get all custom urls(that users have created) for current domain. Then try to match request url with urls from collection. If ok then create route and return it.
    }

    ...

    #endregion
}