# ImmutableListCodec<T> Methods

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

## ConvertFromSurrogate(ImmutableListSurrogate<T>) {#convertfromsurrogate-ref-orleans-serialization-codecs-immutablelistsurrogate-t-9543847b}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.immutablelistcodec-1/methods/convertfromsurrogate-ref-orleans-serialization-codecs-immutablelistsurrogate-t-9543847b/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Codecs/ImmutableListCodec.cs#L26)

```csharp
public override ImmutableList<T> ConvertFromSurrogate(ref ImmutableListSurrogate<T> surrogate)
```

Converts a value from the surrogate type to the field type.

### Parameters

- `surrogate` (`ImmutableListSurrogate<T>`): The surrogate.

### Returns

The value.

## ConvertToSurrogate(ImmutableList&lt;T&gt;, ImmutableListSurrogate&lt;T&gt;) {#converttosurrogate-system-collections-immutable-immutablelist-t-ref-orleans-seri-a60c2fe1}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.immutablelistcodec-1/methods/converttosurrogate-system-collections-immutable-immutablelist-t-ref-orleans-seri-a60c2fe1/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Codecs/ImmutableListCodec.cs#L29)

```csharp
public override void ConvertToSurrogate(ImmutableList<T> value, ref ImmutableListSurrogate<T> surrogate)
```

Converts a value to the surrogate type.

### Parameters

- `value` (`ImmutableList<T>`): The value.
- `surrogate` (`ImmutableListSurrogate<T>`): The surrogate.