# ByteStringCopier.DeepCopy(ByteString?, CopyContext)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.serialization.protobuf/orleans.serialization.bytestringcopier/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.serialization.protobuf/orleans.serialization.bytestringcopier/methods/)

[Source](https://github.com/dotnet/orleans/blob/1644940b035c7bdf215a4fd7135757c06bcfe9ec/src/Serializers/Orleans.Serialization.Protobuf/ByteStringCopier.cs#L18-L32)

```csharp
public ByteString? DeepCopy(ByteString? input, CopyContext context)
```

Creates a deep copy of the provided input.

### Parameters

- `input` (`ByteString?`): The input.
- `context` (`CopyContext`): The context.

### Returns

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