# ConcurrentDictionaryCodec<TKey, TValue>.ConvertToSurrogate(ConcurrentDictionary<TKey, TValue>, ConcurrentDictionarySurrogate<TKey, TValue>)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Serialization/Codecs/ConcurrentDictionaryCodec.cs#L33)

```csharp
public override void ConcurrentDictionaryCodec<TKey, ConvertToSurrogate(ConcurrentDictionary<TKey, TValue> value, ref ConcurrentDictionarySurrogate<TKey, TValue> surrogate)
```

Converts a value to the surrogate type.

### Parameters

- `value` (`ConcurrentDictionary<TKey, TValue>`): The value.
- `surrogate` (`ConcurrentDictionarySurrogate<TKey, TValue>`): The surrogate.