# ReadOnlyCollectionCopier<T>.DeepCopy(ReadOnlyCollection<T>, CopyContext)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Codecs/ReadOnlyCollectionCodec.cs#L69-L91)

```csharp
public ReadOnlyCollection<T> DeepCopy(ReadOnlyCollection<T> input, CopyContext context)
```

Creates a deep copy of the provided input.

### Parameters

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

### Returns

A copy of `input`.