Why should you care?

ShopNest Order aggregate should announce facts without knowing about email or search.

See it live — copy this example

Paste into a C# console or class library project and run dotnet run.

public sealed class Order
{
    private readonly List<object> _events = new();
    public IReadOnlyList<object> DomainEvents => _events;
    public void Place(string sku)
    {
        Console.WriteLine($"order placed {sku}");
        _events.Add(new OrderPlaced(sku));
    }
}
public sealed record OrderPlaced(string Sku);

var order = new Order();
order.Place("HD-100");
foreach (var e in order.DomainEvents) Console.WriteLine(e.GetType().Name);

Run Example »

Edit the code below and click Run to see the result in Toolliyo’s live editor.

What happened?

• Aggregate records events; application layer dispatches after commit (often with outbox).
• Keep events past-tense facts.

Practice next

1. Place an order and list events.
2. Clear events after dispatch.
3. Handler sends email on OrderPlaced.
4. Add OrderCancelled event.
5. Include OrderId in the payload.

Remember

Past-tense domain facts. Raised by aggregates. Dispatched by application layer.

ShopNest OrderPlaced

Order raises OrderPlaced; email handler reacts.

Outcome: Domain stays free of SMTP details.