# AzureBlobSiloBuilderExtensions.AddAzureBlobGrainStorageAsDefault(ISiloBuilder, Action<OptionsBuilder<AzureBlobStorageOptions>>)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.persistence.azurestorage/orleans.hosting.azureblobsilobuilderextensions/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.persistence.azurestorage/orleans.hosting.azureblobsilobuilderextensions/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Azure/Orleans.Persistence.AzureStorage/Hosting/AzureBlobSiloBuilderExtensions.cs)

```csharp
public static ISiloBuilder AddAzureBlobGrainStorageAsDefault(this ISiloBuilder builder, Action<OptionsBuilder<AzureBlobStorageOptions>> configureOptions = null)
```

Configure silo to use azure blob storage as the default grain storage.

### Parameters

- `builder` (`ISiloBuilder`)
- `configureOptions` (`Action<OptionsBuilder<AzureBlobStorageOptions>>`)