# StreamId.Key

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.runtime.streamid/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.runtime.streamid/properties/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Streaming/StreamId.cs#L43)

```csharp
public ReadOnlyMemory<byte> Key
```

Gets the key.

### Value

The key.