private async void LoadData()
        {
            this.randomStockData = new ObservableCollection <Stock>(await LocalStorageHelper.GetRandomStockData());
            await LocalStorageHelper.Restore <Stock>();

            if (LocalStorageHelper.Data.Count > 0)
            {
                foreach (Stock item in LocalStorageHelper.Data)
                {
                    this.Stocks.Add(item);
                }
            }
            else
            {
                this.Stocks.Add(this.GetNewStock("MSFT"));
            }
        }