# ObserverStarting

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#L140)

```csharp
public sealed class ObserverStarting : LifecycleEvent
```

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

## Constructors

- [ObserverStarting(string, int, string, SiloAddress, ILifecycleObserver)](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.core.diagnostics.clientlifecycleevents.observerstarting/constructors/constructor-string-int-string-orleans-runtime-siloaddress-orleans-ilifecycleobse-cb3301a1/)

## Fields

- [Observer](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.core.diagnostics.clientlifecycleevents.observerstarting/fields/observer-5660f2d3/)
- [ObserverName](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.core.diagnostics.clientlifecycleevents.observerstarting/fields/observername-f22b266e/)