# MultiStateTransactionalBitArrayGrain.SetBit(int)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.transactions.testkit.base/orleans.transactions.testkit.correctnesss.multistatetransactionalbitarraygrain/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.transactions.testkit.base/orleans.transactions.testkit.correctnesss.multistatetransactionalbitarraygrain/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Transactions.TestKit.Base/Grains/MultiStateTransactionalBitArrayGrain.cs#L233-L239)

```csharp
public Task SetBit(int index)
```

apply set operation to every transaction state

### Parameters

- `index` (`int`)