public SettledTradeRowBase(TradeRowBase row, string settlementType)
     : base(row)
 {
     this.SettlementType = settlementType;
 }
 public UnsettledTradeRow(TradeRowBase value)
     : base(value)
 {
 }
 public SettledTradeRow(TradeRowBase row, string settlementType)
     : base(row, settlementType)
 {
 }