# StorageFaultGrain.OnWrite(GrainId)

[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#L71-L75)

```csharp
public Task OnWrite(GrainId grainId)
```

Throws a storage exception if one has been added for the grain reference for writing.

### Parameters

- `grainId` (`GrainId`)