public Rule(string title, DateRange activePeriod, CalculationMethod calculationMethod)
: this(title, activePeriod, EmptyCondition.Instance, calculationMethod)
{
}
public Rule(int id, string title, ISpecification <Applicant> condition, Point points, DateRange activePeriod)
{
Id = id;
Title = title;
Condition = condition;
ResultPoint = points;
ActivePeriod = activePeriod;
}