public void FeedComboBoxCurrency(string baseCurrency) { var mc = new MarketController(); IList <CurrencyPair> cps = (mc.GetMarket(baseCurrency).ToArray()); cbCurrencyAchat.Items.Clear(); cbCurrencyVente.Items.Clear(); cbCurrencyAchat.Items.AddRange(cps.ToArray()); cbCurrencyVente.Items.AddRange(cps.ToArray()); }