# TestClusterBuilder.ConfigureBuilder(Action)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.TestingHost/TestClusterBuilder.cs#L90-L91)

```csharp
public TestClusterBuilder ConfigureBuilder(Action configureDelegate)
```

Adds a configuration delegate to the builder

### Parameters

- `configureDelegate` (`Action`): The configuration delegate.