# DefaultStreamIdMapper Constructors

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streams.defaultstreamidmapper/)

## DefaultStreamIdMapper {#constructor-211b8861}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streams.defaultstreamidmapper/constructors/constructor-211b8861/)

```csharp
public DefaultStreamIdMapper()
```