# ITransactionalState<TState>.PerformUpdate(Func<TState, TResult>)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.transactions/orleans.transactions.abstractions.itransactionalstate-1/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.transactions/orleans.transactions.abstractions.itransactionalstate-1/methods/)

```csharp
public abstract Task<TResult> PerformUpdate<TResult>(Func<TState, TResult> updateFunction)
```

Performs an update operation and returns the result.

### Parameters

- `updateFunction` (`Func<TState, TResult>`): A function that can read and update the state, and return a result