public void GetData(Action<DataItem, Exception> callback)
        {
            // Use this to connect to the actual data service

            var item = new DataItem("LoacalTileSample");
            callback(item, null);
        }
        public void GetData(Action<DataItem, Exception> callback)
        {
            // Use this to create design time data

            var item = new DataItem("LocalToastSample");
            callback(item, null);
        }