# SiloBuilderExtensions.AddFaultInjectionMemoryStorage(ISiloBuilder, string, Action<OptionsBuilder<MemoryGrainStorageOptions>>, Action<OptionsBuilder<FaultInjectionGrainStorageOptions>>)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.TestingHost/TestStorageProviders/FaultyMemoryStorage.cs)

```csharp
public static ISiloBuilder AddFaultInjectionMemoryStorage(this ISiloBuilder builder, string name, Action<OptionsBuilder<MemoryGrainStorageOptions>> configureOptions = null, Action<OptionsBuilder<FaultInjectionGrainStorageOptions>> configureFaultInjectionOptions = null)
```

Configures a silo to use [FaultInjectionGrainStorage](/orleans/docs/api/csharp/microsoft.orleans.testinghost/orleans.testinghost.faultinjectiongrainstorage/).

### Parameters

- `builder` (`ISiloBuilder`): The builder.
- `name` (`string`): The storage provider name.
- `configureOptions` (`Action<OptionsBuilder<MemoryGrainStorageOptions>>`): The memory storage configuration delegate.
- `configureFaultInjectionOptions` (`Action<OptionsBuilder<FaultInjectionGrainStorageOptions>>`): The fault injection provider configuration delegate.

### Returns

The silo builder