var options = new CefSharp.BindingOptions() {CamelCaseJavascriptNames = false};

            var bindingOptions = options;

            //For async object registration (equivalent to RegisterJsObject)

            this.Browser.JavascriptObjectRepository.Register("boundAsync", new BoundObject(), true, options);

            this.Browser.JavascriptObjectRepository.Register("boundAsync2", new AsyncBoundObject(), true, options);

<script type="text/javascript">

    function aa()

    {

        // <embed user provided code here>

        CefSharp.BindObjectAsync("boundAsync", "bound").then(function (result) {

            boundAsync.hello('CefSharp');

        });

    };

    function bb(){

        CefSharp.BindObjectAsync("boundAsync2").then(function(result)

        {

            boundAsync2.hello('CefSharp');

        });

    }

</script>