public void Test100() { //Given var pf = new PicoFarads(10); //When var sut = (CapacitanceNumberingSystem)pf; //Then Assert.Equal(100, actual: sut.CapacitanceCode); Assert.Equal(0.01, ((NanoFarads)sut).Value); Assert.Equal(0.00001, ((MicroFarads)sut).Value); }