# IDurableSet<T>.IsProperSubsetOf(IEnumerable<T>)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurableset-1/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurableset-1/methods/)

```csharp
public abstract bool IsProperSubsetOf(IEnumerable<T> other)
```

### Parameters

- `other` (`IEnumerable<T>`)