# ConstructorChannelNamespacePredicateProvider.TryGetPredicate(string, IChannelNamespacePredicate?)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.broadcastchannel/orleans.broadcastchannel.constructorchannelnamespacepredicateprovider/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.broadcastchannel/orleans.broadcastchannel.constructorchannelnamespacepredicateprovider/methods/)

[Source](https://github.com/dotnet/orleans/blob/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Orleans.BroadcastChannel/SubscriberTable/Predicates/DefaultStreamNamespacePredicateProvider.cs#L59-L96)

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

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

### Parameters

- `predicatePattern` (`string`)
- `predicate` (`IChannelNamespacePredicate?`)