# TestClusterBuilder.CreateSiloAsync

[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/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.TestingHost/TestClusterBuilder.cs)

```csharp
public Func<string, IConfiguration, Task<SiloHandle>> CreateSiloAsync
```

Gets or sets the delegate used to create and start an individual silo.