QLNet.SimpleQuote.value C# (CSharp) Метод

        public override double value()
        {
            if (!isValid()) throw new ArgumentException("invalid SimpleQuote");
            return value_.GetValueOrDefault();
        }

 public override double value(double x)
 {
     if (x.IsNotEqual(vol_.value()))
     {
         vol_.setValue(x);
         engine_.calculate();
     }
     return(results_.value.Value - targetValue_);
 }