I heve the error
public long GetPOCVolume() => ladder.Max(kv => kv.Value); public long GetPOCVolume(TradeSide side) => ladderBidAsk[(int). side].Max(kv => kv.Value); public long Volume() => ladder.Sum(kv => kv.Value); public bool IsEmpty() => ladder.Count == 0;
am using the 4.5 .net frame work
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