# ClusterMembershipOptions.DefunctSiloExpiration

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.configuration.clustermembershipoptions/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.configuration.clustermembershipoptions/properties/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core/Configuration/Options/ClusterMembershipOptions.cs)

```csharp
public TimeSpan DefunctSiloExpiration
```

Gets or sets the period of time after which membership entries for defunct silos are eligible for removal. Valid only if [ClusterMembershipOptions](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.configuration.clustermembershipoptions/) is not `null`.

### Value

Defunct silos are eligible for removal from membership after one week by default.