# IStorageFaultGrain.AddFaultOnWrite(GrainId, Exception)

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

```csharp
public abstract 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.