# ConstructorStreamNamespacePredicateProvider.TryGetPredicate(string, IStreamNamespacePredicate)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Streaming/PubSub/DefaultStreamNamespacePredicateProvider.cs#L59-L96)

```csharp
public bool TryGetPredicate(string predicatePattern, out IStreamNamespacePredicate predicate)
```

Get the predicate matching the provided pattern. Returns `false` if this provider cannot match the predicate.

### Parameters

- `predicatePattern` (`string`)
- `predicate` (`IStreamNamespacePredicate`)