# TestClusterBuilder.Properties

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

[Source](https://github.com/dotnet/orleans/blob/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Orleans.TestingHost/TestClusterBuilder.cs#L60)

```csharp
public Dictionary<string, string?> Properties
```

Configuration values which will be provided to the silos and clients created by this builder.