# ObjectCodec.WriteField(Writer<TBufferWriter>, uint, object?)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.objectcodec/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.objectcodec/methods/)

[Source](https://github.com/dotnet/orleans/blob/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Orleans.Serialization/Codecs/ObjectCodec.cs#L89)

```csharp
public static void WriteField<TBufferWriter>(ref Writer<TBufferWriter> writer, uint fieldIdDelta, object? value)
```

Writes a field.

### Parameters

- `writer` (`Writer<TBufferWriter>`): The writer.
- `fieldIdDelta` (`uint`): The field identifier delta.
- `value` (`object?`): The value.