# TransactionalStateStorageTestRunnerxUnit<TState>.ReplaceOne

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.transactions.testkit.xunit/orleans.transactions.testkit.xunit.transactionalstatestoragetestrunnerxunit-1/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.transactions.testkit.xunit/orleans.transactions.testkit.xunit.transactionalstatestoragetestrunnerxunit-1/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Transactions.TestKit.xUnit/TransactionalStateStorageTestRunner.cs#L55)

```csharp
public override Task ReplaceOne()
```