# 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/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Orleans.EventSourcing/Hosting/CustomStorageSiloBuilderExtensions.cs#L19)

```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?`)