AjaxControlToolkit.Rating.OnLoad C# (CSharp) Method

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

            var cm = Page.ClientScript;

            // Create JavaScript function for ClientCallBack WebForm_DoCallBack
            // Not sure why we need it, but the callback doesn't get registered on the client
            // side properly without it.
            //
            cm.GetCallbackEventReference(this, String.Empty, String.Empty, String.Empty);

            EnsureChildControls();

            _extender.CallbackID = UniqueID;
        }