public void TestAge()
        {
            string st = $"Тебе 13 лет, 11 месяцев и 22 дней";

            Assert.Equal(st, AgeC.Age(new DateTime(2000, 11, 20), new DateTime(2014, 11, 11)));
        }
        public void TestAgeToday()
        {
            string str = $"Тебе 9 лет, 0 месяцев и 0 дней";

            Assert.Equal(str, AgeC.Age(new DateTime(2010, 12, 21), new DateTime(2019, 12, 21)));
        }
        public void TestAgeTommorow()
        {
            string str = $"Тебе 13 лет, 11 месяцев и 30 дней";

            Assert.Equal(str, AgeC.Age(new DateTime(2000, 11, 20), new DateTime(2014, 11, 19)));
        }
        public void TestAgeVchera()
        {
            string str = $"Тебе 8 лет, 0 месяцев и 1 дней";

            Assert.Equal(str, AgeC.Age(new DateTime(2011, 12, 20), new DateTime(2019, 12, 21)));
        }