# PrimaryBasedLogViewAdaptor<TLogView, TLogEntry, TSubmissionEntry>.Merge(INotificationMessage, INotificationMessage)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.eventsourcing/orleans.eventsourcing.common.primarybasedlogviewadaptor-3/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.eventsourcing/orleans.eventsourcing.common.primarybasedlogviewadaptor-3/methods/)

[Source](https://github.com/dotnet/orleans/blob/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Orleans.EventSourcing/Common/PrimaryBasedLogViewAdaptor.cs#L163-L166)

```csharp
protected virtual INotificationMessage PrimaryBasedLogViewAdaptor<TLogView, TLogEntry, Merge(INotificationMessage earliermessage, INotificationMessage latermessage)
```

Merge two notification messages, for batching. Override to handle notification subtypes.

### Parameters

- `earliermessage` (`INotificationMessage`)
- `latermessage` (`INotificationMessage`)