# CachedMessage.StreamId

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.cachedmessage/) | [Fields](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.cachedmessage/fields/)

```csharp
public StreamId StreamId
```

Identity of the stream this message is a part of.