Как получить TheorPrice по BlackScholes

private static Security CreateStrike(decimal strike, decimal oi, decimal iv, OptionTypes type, DateTime expiryDate, Security asset, decimal? lastTrade) { var s = new Security { Code = "RI {0} {1}".Put(type == OptionTypes.Call ? 'C' : 'P', strike), Strike = strike, OpenInterest = oi, ImpliedVolatility = iv, HistoricalVolatility = iv, OptionType = type, ExpiryDate = expiryDate, Board = ExchangeBoard.Forts, UnderlyingSecurityId = asset.Id, LastTrade = lastTrade == null ? null : new Trade , Volume = 999,//RandomGen.GetInt(10000), Type = SecurityTypes.Option, //TheorPrice = 1212m, };

		s.BestBid = new Quote(s, s.StepPrice ?? 1m * RandomGen.GetInt(100), s.VolumeStep ?? 1m * RandomGen.GetInt(100), Sides.Buy);
		s.BestAsk = new Quote(s, s.BestBid.Price.Max(s.StepPrice ?? 1m * RandomGen.GetInt(100)), s.VolumeStep ?? 1m * RandomGen.GetInt(100), Sides.Sell);

		return s;
	}

var asset = new Security { Id = "RIH5@FORTS", PriceStep = 10, };

        asset.BestBid = new Quote(asset, asset.StepPrice ?? 1m * RandomGen.GetInt(100), asset.VolumeStep ?? 1m * RandomGen.GetInt(100), Sides.Buy);
        asset.BestAsk = new Quote(asset, asset.BestBid.Price.Max(asset.StepPrice ?? 1m * RandomGen.GetInt(100)), asset.VolumeStep ?? 1m * RandomGen.GetInt(100), Sides.Sell);

        asset.LastTrade = new Trade
		{
			Security = asset,
			Price = 105000,
		};

		var expiryDate = new DateTime(2014, 09, 15);
		var currDate = new DateTime(2014, 08, 02);

        var securities = new List<Security>
		{
			asset,

			CreateStrike(105000, 10, 60, OptionTypes.Call, expiryDate, asset, 105000),
			CreateStrike(105000, 10, 50, OptionTypes.Put, expiryDate, asset, 105000)
		};

		var dummyProvider = new DummyProvider(securities, new[]
		{
			new Position
			{
				Security = asset,
				//CurrentValue = -100,
			}
		});

        Security blackScholesOption = CreateStrike(105000, 10, 60, OptionTypes.Call, expiryDate, asset, 105000);
        BlackScholes blackScholes = new BlackScholes(blackScholesOption, asset, dummyProvider);