# RepeatedFieldCodec<T>.WriteField(Writer<TBufferWriter>, uint, Type, RepeatedField<T>)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.serialization.protobuf/orleans.serialization.repeatedfieldcodec-1/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.serialization.protobuf/orleans.serialization.repeatedfieldcodec-1/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Serializers/Orleans.Serialization.Protobuf/RepeatedFieldCodec.cs#L37-L56)

```csharp
public void WriteField<TBufferWriter>(ref Writer<TBufferWriter> writer, uint fieldIdDelta, Type expectedType, RepeatedField<T> value)
```

Writes a field.

### Parameters

- `writer` (`Writer<TBufferWriter>`): The writer.
- `fieldIdDelta` (`uint`): The field identifier delta.
- `expectedType` (`Type`): The expected type.
- `value` (`RepeatedField<T>`): The value.