# SystemTarget.Deactivate(DeactivationReason, CancellationToken)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.systemtarget/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.systemtarget/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Runtime/Core/SystemTarget.cs#L384)

```csharp
public void Deactivate(DeactivationReason deactivationReason, CancellationToken cancellationToken)
```

Start deactivating this instance.

### Parameters

- `deactivationReason` (`DeactivationReason`): The reason for deactivation, for informational purposes.
- `cancellationToken` (`CancellationToken`): A cancellation token which, when canceled, indicates that the process should complete promptly.