# ILifecycleParticipant<TLifecycleObservable>.Participate(TLifecycleObservable)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.ilifecycleparticipant-1/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.ilifecycleparticipant-1/methods/)

```csharp
public abstract void Participate(TLifecycleObservable lifecycle)
```

Adds the provided observer as a participant in the lifecycle.

### Parameters

- `lifecycle` (`TLifecycleObservable`): The observer.