# ObserverStopping

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/Diagnostics/SiloLifecycleEvents.cs#L281)

```csharp
public sealed class ObserverStopping : LifecycleEvent
```

Event payload for when a lifecycle observer is about to stop.

## Constructors

- [ObserverStopping(string, int, string, SiloAddress?, ILifecycleObserver)](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.diagnostics.silolifecycleevents.observerstopping/constructors/constructor-string-int-string-orleans-runtime-siloaddress-nullable-orleans-ilife-8b209eee/)

## Fields

- [Observer](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.diagnostics.silolifecycleevents.observerstopping/fields/observer-75cefb43/)
- [ObserverName](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.diagnostics.silolifecycleevents.observerstopping/fields/observername-a059228e/)