# SubscriptionAttached

Package: [Microsoft.Orleans.Streaming](/orleans/docs/api/csharp/microsoft.orleans.streaming/) 10.0.0

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Streaming) | [Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Streaming/Diagnostics/StreamingEvents.cs#L184)

```csharp
public sealed class SubscriptionAttached : StreamingEvent
```

Event payload for when a stream subscription is attached to a pulling agent and ready to receive data.

## Constructors

- [SubscriptionAttached(string, StreamId, Guid, GrainId, SiloAddress?)](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streaming.diagnostics.streamingevents.subscriptionattached/constructors/constructor-string-orleans-runtime-streamid-system-guid-orleans-runtime-grainid-7ded7dd5/)

## Fields

- [ConsumerGrainId](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streaming.diagnostics.streamingevents.subscriptionattached/fields/consumergrainid-06146555/)
- [StreamId](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streaming.diagnostics.streamingevents.subscriptionattached/fields/streamid-4c9f8107/)
- [SubscriptionId](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streaming.diagnostics.streamingevents.subscriptionattached/fields/subscriptionid-bd3f4916/)