# ZooKeeperBasedMembershipTable.CleanupDefunctSiloEntries(DateTimeOffset)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.clustering.zookeeper/orleans.runtime.membership.zookeeperbasedmembershiptable/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.clustering.zookeeper/orleans.runtime.membership.zookeeperbasedmembershiptable/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Clustering.ZooKeeper/ZooKeeperBasedMembershipTable.cs#L339-L355)

```csharp
public Task CleanupDefunctSiloEntries(DateTimeOffset beforeDate)
```

Delete all dead silo entries older than `beforeDate`

### Parameters

- `beforeDate` (`DateTimeOffset`)