# MultiStateTransactionalGrainBaseClass.Add(int)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Transactions.TestKit.Base/Grains/MultiStateTransactionalGrain.cs#L100-L112)

```csharp
public Task<int[]> Add(int numberToAdd)
```

apply add operation to every transaction state

### Parameters

- `numberToAdd` (`int`)