# JournalBufferWriter.WriteAt(int, ReadOnlySpan<byte>)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.journalbufferwriter/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.journalbufferwriter/methods/)

[Source](https://github.com/dotnet/orleans/blob/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Orleans.Journaling/JournalBufferWriter.cs#L109-L127)

```csharp
protected void WriteAt(int offset, ReadOnlySpan<byte> value)
```

Patches format-owned framing bytes at the specified offset in the active entry.

### Parameters

- `offset` (`int`): The offset into the active entry.
- `value` (`ReadOnlySpan<byte>`): The replacement bytes.