# ChronologicalEvictionStrategy

Package: [Microsoft.Orleans.Streaming](/orleans/docs/api/csharp/microsoft.orleans.streaming/) 10.0.0

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Streaming) | [Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Streaming/Common/PooledCache/ChronologicalEvictionStrategy.cs#L11)

```csharp
public class ChronologicalEvictionStrategy : IEvictionStrategy
```

Eviction strategy that evicts data based off of age.

## Constructors

- [ChronologicalEvictionStrategy(ILogger, TimePurgePredicate, ICacheMonitor, TimeSpan?)](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.chronologicalevictionstrategy/constructors/constructor-microsoft-extensions-logging-ilogger-orleans-providers-streams-commo-6771f311/)

## Properties

- [OnPurged](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.chronologicalevictionstrategy/properties/onpurged-e949c930/)
- [PurgeObservable](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.chronologicalevictionstrategy/properties/purgeobservable-a49cca1d/)

## Methods

- [OnBlockAllocated(FixedSizeBuffer)](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.chronologicalevictionstrategy/methods/onblockallocated-orleans-providers-streams-common-fixedsizebuffer-8795d866/)
- [PerformPurge(DateTime)](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.chronologicalevictionstrategy/methods/performpurge-system-datetime-1ca01dde/)