# JournaledGrain<TGrainState, TEventBase>.RaiseConditionalEvent(TEvent)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.eventsourcing/orleans.eventsourcing.journaledgrain-2/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.eventsourcing/orleans.eventsourcing.journaledgrain-2/methods/)

[Source](https://github.com/dotnet/orleans/blob/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Orleans.EventSourcing/JournaledGrain.cs#L74-L76)

```csharp
protected virtual Task<bool> JournaledGrain<TGrainState, RaiseConditionalEvent<TEvent>(TEvent @event)
```

Raise an event conditionally. Succeeds only if there are no conflicts, that is, no other events were raised in the meantime.

### Parameters

- `event` (`TEvent`): Event to raise.

### Returns

`true` if successful, `false` if there was a conflict.