# IActivationWorkingSetObserver

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

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Runtime) | [Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Runtime/Catalog/ActivationWorkingSet.cs#L254)

```csharp
public interface IActivationWorkingSetObserver
```

An [IActivationWorkingSet](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.iactivationworkingset/) observer.

## Methods

- [OnActive(IActivationWorkingSetMember)](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.iactivationworkingsetobserver/methods/onactive-orleans-runtime-iactivationworkingsetmember-43409471/)
- [OnAdded(IActivationWorkingSetMember)](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.iactivationworkingsetobserver/methods/onadded-orleans-runtime-iactivationworkingsetmember-84adf335/)
- [OnDeactivated(IActivationWorkingSetMember)](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.iactivationworkingsetobserver/methods/ondeactivated-orleans-runtime-iactivationworkingsetmember-f5096c09/)
- [OnDeactivating(IActivationWorkingSetMember)](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.iactivationworkingsetobserver/methods/ondeactivating-orleans-runtime-iactivationworkingsetmember-56346626/)
- [OnEvicted(IActivationWorkingSetMember)](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.iactivationworkingsetobserver/methods/onevicted-orleans-runtime-iactivationworkingsetmember-5cf51717/)
- [OnIdle(IActivationWorkingSetMember)](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.iactivationworkingsetobserver/methods/onidle-orleans-runtime-iactivationworkingsetmember-1dd8bfe1/)