# IPurgeObservable

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

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Streaming)

```csharp
public interface IPurgeObservable
```

Functionality for purge-related actions.

## Properties

- [IsEmpty](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.ipurgeobservable/properties/isempty-471a272e/)
- [ItemCount](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.ipurgeobservable/properties/itemcount-52ff99ca/)
- [Newest](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.ipurgeobservable/properties/newest-d1fd04a9/)
- [Oldest](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.ipurgeobservable/properties/oldest-284c0920/)

## Methods

- [RemoveOldestMessage](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.providers.streams.common.ipurgeobservable/methods/removeoldestmessage-d50debe0/)