public async void LlenarLista(int usrid)
        {
            RepositoryWS <Memorizar> ws = new RepositoryWS <Memorizar>();

            ws.urlWebService = new UrlServer().Server + "API/APIMemorizar?UsrId=" + usrid;
            LstMemorizar     = await ws.GET();

            NoRow = LstMemorizar.Count;
            if (NoRow > 0)
            {
                NoRow     = NoRow - 1;
                Memorizar = LstMemorizar[NoRowActual];
                OnPropertyChanged("PieDePagina");
            }
        }
        public async void LlenarLista(int usrid)
        {
            if (IsBusy == false)
            {
                IsBusy           = true;
                ws               = new RepositoryWS <Memorizar>();
                ws.urlWebService = new UrlServer().Server + "API/APIMemorizar?UsrId=" + usrid;
                LstMemorizar     = await ws.GET();

                if (LstMemorizar.Count == 0)
                {
                    MostrarMensajeRow = true;
                }
                TotalRow = LstMemorizar.Count;
                OnPropertyChanged("Paginacion");
                IsBusy = false;
            }
        }