# EventDataExtensions.SetStreamNamespaceProperty(EventData, string?)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming.eventhubs/orleans.streaming.eventhubs.eventdataextensions/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.streaming.eventhubs/orleans.streaming.eventhubs.eventdataextensions/methods/)

[Source](https://github.com/dotnet/orleans/blob/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Azure/Orleans.Streaming.EventHubs/Providers/Streams/EventHub/EventDataExtensions.cs#L22-L23)

```csharp
public static void SetStreamNamespaceProperty(this EventData eventData, string? streamNamespace)
```

Adds stream namespace to the EventData

### Parameters

- `eventData` (`EventData`)
- `streamNamespace` (`string?`)