# FSharpMapCodec<TKey, TValue>.ConvertFromSurrogate(FSharpMapSurrogate<TKey, TValue>)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization.FSharp/FSharpCodecs.cs#L1030-L1032)

```csharp
public override FSharpMap<TKey, TValue> FSharpMapCodec<TKey, ConvertFromSurrogate(ref FSharpMapSurrogate<TKey, TValue> surrogate)
```

Converts a value from the surrogate type to the field type.

### Parameters

- `surrogate` (`FSharpMapSurrogate<TKey, TValue>`): The surrogate.

### Returns

The value.