private int FindSellOrderIndex(string orderId, int cookie) { int index = -1; if (!orderId.Equals("")) // поиск только по orderId { index = SellOrders.FindIndex(x => x.OrderId.Equals(orderId)); return(index); } else { index = SellOrders.FindIndex(x => x.OrderId.Equals(orderId)); if (index == -1 || orderId.Equals("")) { index = -1; } if (index != -1) { return(index); } index = SellOrders.FindIndex(x => x.Cookie == cookie); } return(index); }