public void An_insert_concurrency_exception_wrapped_in_an_exception_is_a_concurrency_exception()
        {
            var exception =
                new AggregateException(
                    new DataException("Cannot insert duplicate key"));

            exception.IsConcurrencyException().Should().BeTrue();
        }
        public void An_insert_concurrency_exception_nested_deep_in_other_exceptions_is_a_concurrency_exception2()
        {
            var exception =
                new AggregateException(
                    new AggregateException(
                        new DataException("Cannot insert duplicate key")));

            exception.IsConcurrencyException().Should().BeTrue();
        }