# InProcessTestCluster.StartSiloAsync(int, InProcessTestClusterOptions, CancellationToken)

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

[Source](https://github.com/dotnet/orleans/blob/1644940b035c7bdf215a4fd7135757c06bcfe9ec/src/Orleans.TestingHost/InProcTestCluster.cs#L1070)

```csharp
public Task<InProcessSiloHandle> StartSiloAsync(int instanceNumber, InProcessTestClusterOptions clusterOptions, CancellationToken cancellationToken)
```

Starts a new silo.

### Parameters

- `instanceNumber` (`int`): The instance number to deploy.
- `clusterOptions` (`InProcessTestClusterOptions`): The options to use.
- `cancellationToken` (`CancellationToken`): The token used to cancel silo startup.

### Returns

A handle to the deployed silo.