# IStreamNamespacePredicate

Package: [Microsoft.Orleans.Streaming](/orleans/docs/api/csharp/microsoft.orleans.streaming/) 10.0.0

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Streaming)

```csharp
public interface IStreamNamespacePredicate
```

Stream namespace predicate used for filtering implicit subscriptions using [ImplicitStreamSubscriptionAttribute](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.implicitstreamsubscriptionattribute/).

## Remarks

All implementations must be serializable.

## Properties

- [PredicatePattern](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streams.istreamnamespacepredicate/properties/predicatepattern-a739edb3/)

## Methods

- [IsMatch(string)](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streams.istreamnamespacepredicate/methods/ismatch-string-31dd3233/)