# MapFieldCopier<TKey, TValue> Constructors

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.serialization.protobuf/orleans.serialization.mapfieldcopier-2/)

## MapFieldCopier<TKey, TValue>(IDeepCopier<TKey>, IDeepCopier<TValue>) {#constructor-orleans-serialization-cloning-ideepcopier-tkey-orleans-serialization-8190f26f}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.serialization.protobuf/orleans.serialization.mapfieldcopier-2/constructors/constructor-orleans-serialization-cloning-ideepcopier-tkey-orleans-serialization-8190f26f/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Serializers/Orleans.Serialization.Protobuf/MapFieldCopier.cs#L23-L27)

```csharp
public MapFieldCopier<TKey, MapFieldCopier(IDeepCopier<TKey> keyCopier, IDeepCopier<TValue> valueCopier)
```

Initializes a new instance of the `Orleans.Serialization.MapFieldCopier-2` class.

### Parameters

- `keyCopier` (`IDeepCopier<TKey>`): The key copier.
- `valueCopier` (`IDeepCopier<TValue>`): The value copier.