# ConcurrentDictionaryCopier<TKey, TValue>.DeepCopy(ConcurrentDictionary<TKey, TValue>, ConcurrentDictionary<TKey, TValue>, CopyContext)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.concurrentdictionarycopier-2/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.codecs.concurrentdictionarycopier-2/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Codecs/ConcurrentDictionaryCodec.cs#L108-L112)

```csharp
public void ConcurrentDictionaryCopier<TKey, DeepCopy(ConcurrentDictionary<TKey, TValue> input, ConcurrentDictionary<TKey, TValue> output, CopyContext context)
```

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

### Parameters

- `input` (`ConcurrentDictionary<TKey, TValue>`): The input.
- `output` (`ConcurrentDictionary<TKey, TValue>`): The output.
- `context` (`CopyContext`): The context.