# FrozenDictionaryCopier<TKey, TValue>.DeepCopy(FrozenDictionary<TKey, TValue>, CopyContext)

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

[Source](https://github.com/dotnet/orleans/blob/1644940b035c7bdf215a4fd7135757c06bcfe9ec/src/Orleans.Serialization/Codecs/FrozenDictionaryCodec.cs#L90-L110)

```csharp
public FrozenDictionary<TKey, TValue>? FrozenDictionaryCopier<TKey, DeepCopy(FrozenDictionary<TKey, TValue>? input, CopyContext context)
```

Creates a deep copy of the provided input.

### Parameters

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

### Returns

A copy of `input`, or `null` if `input` is `null`.