# StorageFaultGrain.AddFaultOnWrite(GrainId, Exception)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.TestingHost/TestStorageProviders/StorageFaultGrain.cs#L45-L47)

```csharp
public Task AddFaultOnWrite(GrainId grainId, Exception exception)
```

Adds a storage exception to be thrown when the referenced grain writes state to a storage provider

### Parameters

- `grainId` (`GrainId`)
- `exception` (`Exception`)

### Returns

Task.