# ObserverStopping

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

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Core) | [Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core/Diagnostics/ClientLifecycleEvents.cs#L284)

```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.core/orleans.core.diagnostics.clientlifecycleevents.observerstopping/constructors/constructor-string-int-string-orleans-runtime-siloaddress-orleans-ilifecycleobse-348da029/)

## Fields

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