# LeaseBasedQueueBalancer.OnClusterMembershipChange(HashSet<SiloAddress>)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streams.leasebasedqueuebalancer/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.streams.leasebasedqueuebalancer/methods/)

[Source](https://github.com/dotnet/orleans/blob/b7a9e3e1c9c54b3cec3a467c5734bf7744541bcf/src/Orleans.Streaming/QueueBalancer/LeaseBasedQueueBalancer.cs#L424-L426)

```csharp
protected override void OnClusterMembershipChange(HashSet<SiloAddress> activeSilos)
```

### Parameters

- `activeSilos` (`HashSet<SiloAddress>`)