DDD-app.layer-example.cs

public IHttpActionResult SavePhoneSystems(long waiverId, IList<PhoneSystemModel> model)
{
    var waiver = ReturnUnfinishedWaiverByIdForUser(waiverId);

    // Save phone systems (with addresses)
    using (var tx = TransactionScopeBuilder.New())
    {
        waiver.SetPhoneSystems(model);
        waiver.MarkAsDataCompletelyEntered();

        DbContext.SaveChanges();

        tx.Complete();
    }

    // NOTE:
    // We use 2 transactions for a good reason.
    // We have separate state for all data entered and saved and for forms generated.
    // By doing 2 transactions, we ensure that a timeout - that might occure by the longer lasting form generation -...
    // ...won't roll back data the user already entered (and out logic saved).
    //
    // If the process below would take much more time than 2-5 secs, messaging systems like Hangfire.io, NServiceBus shold be used.

    // Do generate new form...
    using (var tx = TransactionScopeBuilder.New(timeout: TimeSpan.FromSeconds(60)))
    {
        if (waiver.IsReviewNeeded)
        {
            WaiverFormsGenerator.CreateDocumentsFor(waiver);
        }

        DbContext.SaveChanges();

        tx.Complete();
    }

    // Success
    return Ok();
}