# InProcessTestClusterBuilder.ConfigureHost(Action<IHostApplicationBuilder>)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.TestingHost/InProcTestClusterBuilder.cs#L58-L60)

```csharp
public InProcessTestClusterBuilder ConfigureHost(Action<IHostApplicationBuilder> configureDelegate)
```

Adds a delegate for configuring silo and client hosts.

### Parameters

- `configureDelegate` (`Action<IHostApplicationBuilder>`)