# IRehydrationContext.TryGetValue(string, T?)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.irehydrationcontext/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.runtime.irehydrationcontext/methods/)

```csharp
public abstract bool TryGetValue<T>(string key, out T? value)
```

Tries to get a value from the rehydration context, associated with the provided key, deserializing it using [Serializer](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.serializer/). If a serializer is found for the value, and the key is present, then the value is deserialized and the method returns `true`. If no serializer exists or the key has already been added, then the value is not added and the method returns `false`.

### Parameters

- `key` (`string`): The key.
- `value` (`T?`): The value, if present.

### Returns

`true` if the key exists in the context, otherwise `false`.