# CustomStorageSiloBuilderExtensions.AddCustomStorageBasedLogConsistencyProviderAsDefault(ISiloBuilder, string)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.eventsourcing/orleans.hosting.customstoragesilobuilderextensions/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.eventsourcing/orleans.hosting.customstoragesilobuilderextensions/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.EventSourcing/Hosting/CustomStorageSiloBuilderExtensions.cs#L20)

```csharp
public static ISiloBuilder AddCustomStorageBasedLogConsistencyProviderAsDefault(this ISiloBuilder builder, string primaryCluster = null)
```

Adds a custom storage log consistency provider as default consistency provider"/>

### Parameters

- `builder` (`ISiloBuilder`)
- `primaryCluster` (`string`)