public void CompareToTest()
        {
            //arrange
            var first = new Constituent
            {
                StockExchange = "NYSE",
                Identifier    = "GE",
            };
            var second = new Constituent
            {
                StockExchange = "NYSE",
                Identifier    = "GE",
            };
            //act
            var result = first.CompareTo(second);

            //assert
            Assert.True(result == 0);
        }