# TimeProviderTestingExtensions Methods

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.testinghost/orleans.testinghost.timeprovidertestingextensions/)

## UseTimeProviderForBackgroundAreas(IServiceCollection, TimeProvider) {#usetimeproviderforbackgroundareas-this-microsoft-extensions-dependencyinjection-7c107389}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.testinghost/orleans.testinghost.timeprovidertestingextensions/methods/usetimeproviderforbackgroundareas-this-microsoft-extensions-dependencyinjection-7c107389/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.TestingHost/TimeProviderTestingExtensions.cs#L34-L44)

```csharp
public static IServiceCollection UseTimeProviderForBackgroundAreas(this IServiceCollection services, TimeProvider timeProvider)
```

Overrides the `System.TimeProvider` for every keyed area except the grain-facing area ([TimeProviderNames](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.runtime.timeprovidernames/)), which continues to resolve the default (unkeyed) provider.

### Parameters

- `services` (`IServiceCollection`): The service collection.
- `timeProvider` (`TimeProvider`): The time provider to use for background areas.