# ListCopier<T>.DeepCopy(List<T>, List<T>, CopyContext)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Codecs/ListCodec.cs#L210-L219)

```csharp
public void DeepCopy(List<T> input, List<T> output, CopyContext context)
```

Clones members from `input` and copies them to `output`.

### Parameters

- `input` (`List<T>`): The input.
- `output` (`List<T>`): The output.
- `context` (`CopyContext`): The context.