RouteTable.Routes.MapRoute("action", "api.mvc/{controller}/{action}", new {action = "Index"});

HttpContext.Current.RewritePath(Request.ApplicationPath, false);
        IHttpHandler httpHandler = new MvcHttpHandler();
        httpHandler.ProcessRequest(HttpContext.Current);

RouteTable.Routes.MapRoute("default", "", new {controller="Home", action = "Index" });

<httpModules>
    <add name="UrlRoutingModule" type="System.Web.Routing.UrlRoutingModule, System.Web.Routing"/>
</httpModules>