# FSharpMapCodec<TKey, TValue>.ConvertToSurrogate(FSharpMap<TKey, TValue>, 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#L1037-L1041)

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

Converts a value to the surrogate type.

### Parameters

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