无法解释的TransactionAbortedException

Question

我有以下代码：

using (var transaction = new TransactionScope(TransactionScopeOption.Required,
                    new TransactionOptions {IsolationLevel = IsolationLevel.ReadCommitted}))
                {
                    try
                    {
                            var guid = otherRepository.GetGuid(otherGuid.Value);
                            var result =
                                anotherRepository.DeleteFile($"Documents/{guid}/{id}");
                            result.Message = resultaat.Success ? "success" : resultaat.Message;
                            result.Success = resultaat.Success;
                            transaction.Complete();
                            return Json(result);
                    }
                    catch (Exception ex)
                    {
                        transaction.Dispose();
                        ErrorSignal.FromCurrentContext().Raise(ex);
                        result.Message = "error";
                        return Json(result);
                    }
                }

奇怪的是，整个try块都被执行了（包括transaction.Complete（））。但是之后，代码仍然在catch块的最后一行抛出错误（跳过其余部分！）

该错误显示为：

system.transactions.transactionabortedexception the transaction has aborted

交易完成后如何获得此错误？为什么未捕获？