# StreamSubscription.GrainId

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streams.core.streamsubscription/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streams.core.streamsubscription/properties/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Streaming/Core/StreamSubscription.cs#L53)

```csharp
[Orleans.Id(3)]
public GrainId GrainId
```

Gets or sets the grain identifier.

### Value

The grain identifier.