# ObserverManager<TObserver> Constructors

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.utilities.observermanager-1/)

## ObserverManager<TObserver>(TimeSpan, ILogger) {#constructor-system-timespan-microsoft-extensions-logging-ilogger-edc06432}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.utilities.observermanager-1/constructors/constructor-system-timespan-microsoft-extensions-logging-ilogger-edc06432/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core/Utils/ObserverManager.cs#L26-L28)

```csharp
public ObserverManager(TimeSpan expiration, ILogger log)
```

Initializes a new instance of the `Orleans.Utilities.ObserverManager-1` class.

### Parameters

- `expiration` (`TimeSpan`): The expiration.
- `log` (`ILogger`): The log.