public void ChangeDrpParticipation()
        {
            var stock = new Stock(Guid.NewGuid());

            stock.List("ABC", "ABC Pty Ltd", new Date(1974, 01, 01), false, AssetCategory.AustralianStocks);

            var holding = new Holding(stock, new Date(2000, 01, 01));

            holding.ChangeDrpParticipation(true);

            holding.Settings.ParticipateInDrp.Should().BeTrue();
        }