public void Initialize()
        {
            if (initialized)
            {
                return;
            }
            initialized = true;

            FastTrackPage page = this.Page as FastTrackPage;

            if (page != null)
            {
                if (!Page.IsPostBack)
                {
                    if (page.GetPropertyNullStatus(propertyName))
                    {
                        this.Checked = true;
                    }
                }
            }
        }