//
            // ====================================================================================================
            //
            public override object Execute(CPBaseClass CP)
            {
                const string designBlockName = "Tile Design Block";

                try {
                    //
                    // -- read instanceId, guid created uniquely for this instance of the addon on a page
                    var result       = string.Empty;
                    var settingsGuid = DesignBlockController.getSettingsGuid(CP, designBlockName, ref result);
                    if ((string.IsNullOrEmpty(settingsGuid)))
                    {
                        return(result);
                    }
                    //
                    // -- locate or create a data record for this guid
                    var settings = SampleModel.createOrAddSettings(CP, settingsGuid);
                    if ((settings == null))
                    {
                        throw new ApplicationException("Could not create the design block settings record.");
                    }
                    //
                    // -- translate the Db model to a view model and mustache it into the layout
                    var viewModel = SampleViewModel.create(CP, settings);
                    if ((viewModel == null))
                    {
                        throw new ApplicationException("Could not create design block view model.");
                    }
                    result = Nustache.Core.Render.StringToString(Properties.Resources.SampleLayout, viewModel);
                    //
                    // -- if editing enabled, add the link and wrapperwrapper
                    return(CP.Content.GetEditWrapper(result, SampleModel.tableMetadata.contentName, settings.id));
                } catch (Exception ex) {
                    CP.Site.ErrorReport(ex);
                    return("<!-- " + designBlockName + ", Unexpected Exception -->");
                }
            }