public void TestExplicitConversion()
        {
            var now = DateTime.Now;

            DateOfBirth dateOfBirth = new DateOfBirth(now);
            long ticks = (long)dateOfBirth;

            now.Ticks.ShouldBe(ticks);

            dateOfBirth.ToIn64().ShouldBe(now.Ticks);
        }
        public void TestImplictConversion()
        {
            var now = DateTime.Now;

            DateOfBirth dateOfBirth1 = new DateOfBirth(now);
            DateOfBirth dateOfBirth2 = now.Ticks;

            dateOfBirth1.DateTime.ShouldBe(dateOfBirth2.DateTime);
        }