public void Test1()
        {
            /*
             *  How many Sundays fell on the first of the month    1901/1902
             */
            var sut             = new E019CountingSundays();
            var fromDate        = new DateTime(1901, 1, 1);
            var toDate          = new DateTime(1902, 12, 31);
            int sundaysExpected = 3;
            int sundays         = sut.CountingSundays(fromDate: fromDate, toDate: toDate);

            Assert.Equal(sundaysExpected, sundays);
        }
        public void Solution()
        {
            /*
             *  How many Sundays fell on the first of the month during the twentieth century (1 Jan 1901 to 31 Dec 2000)?
             */

            var sut = new E019CountingSundays();

            var fromDate = new DateTime(1901, 1, 1);
            var toDate   = new DateTime(2000, 12, 31);

            int sundaysExpected = 171;
            int sundays         = sut.CountingSundays(fromDate: fromDate, toDate: toDate);

            Assert.Equal(sundaysExpected, sundays);

            /*
             * Congratulations, the answer you gave to problem 19 is correct.
             *
             *  You are the 119283rd person to have solved this problem.
             */
        }