public async Task GetPublicTickers() { // Public symbol statistics List <TTTicker> publicTickers; if (string.IsNullOrEmpty(PublicTickersFilter)) { publicTickers = await _client.GetPublicAllTickersAsync(); } else { publicTickers = await _client.GetPublicTickerAsync(PublicTickersFilter); } PublicTickers = publicTickers != null ? new ObservableCollection <TTTicker>(publicTickers) : null; }