public void ToDateTime_Utc()
        {
            DateOnly date         = new DateOnly(2000, 1, 1);
            DateTime expectedDate = new DateTime(2000, 1, 1, 0, 0, 0, DateTimeKind.Utc);
            DateTime dateTime1    = date.ToUtcDateTime();
            DateTime dateTime2    = date.ToDateTime(DateTimeKind.Utc);

            Assert.Equal(expectedDate, dateTime1);
            Assert.Equal(expectedDate, dateTime2);
        }