# ISiloLifecycleSubject

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

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

```csharp
public interface ISiloLifecycleSubject : ILifecycleObservable, ILifecycleObserver, ISiloLifecycle
```

Observable silo lifecycle and observer.