# ReadOnlyCollectionCodec<T> Constructors

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.readonlycollectioncodec-1/)

## ReadOnlyCollectionCodec<T>(IValueSerializer<ReadOnlyCollectionSurrogate<T>>) {#constructor-orleans-serialization-serializers-ivalueserializer-orleans-serializa-f3de1bfd}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.readonlycollectioncodec-1/constructors/constructor-orleans-serialization-serializers-ivalueserializer-orleans-serializa-f3de1bfd/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Codecs/ReadOnlyCollectionCodec.cs#L36-L38)

```csharp
public ReadOnlyCollectionCodec(IValueSerializer<ReadOnlyCollectionSurrogate<T>> surrogateSerializer)
```

Initializes a new instance of the `Orleans.Serialization.Codecs.ReadOnlyCollectionCodec-1` class.

### Parameters

- `surrogateSerializer` (`IValueSerializer<ReadOnlyCollectionSurrogate<T>>`): The surrogate serializer.