Gringotts.Domain.Holding.Add C# (CSharp) Method

        public void Add(Investment investment)
        {
            investments.Add(investment);
        }

 public void Should_Be_Able_To_Calculate_Participation()
 {
     Holding holding = new Holding();
     holding.Add(new Investment(new Investor(new Name("quarter"), new GringottsDate(DateTime.Now), new Amount(1500)), null, new Amount(250)));
     holding.Add(new Investment(new Investor(new Name("threeFourths"), new GringottsDate(DateTime.Now), new Amount(1000)), null, new Amount(750)));
     holding.DistributeDividends(new Amount(1000));
 }