# IDurableQueueCommandCodec<T>.WriteSnapshot(IReadOnlyCollection<T>, JournalStreamWriter)

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

```csharp
public abstract void WriteSnapshot(IReadOnlyCollection<T> items, JournalStreamWriter writer)
```

Writes a snapshot command, deriving the item count from `items`.

### Parameters

- `items` (`IReadOnlyCollection<T>`)
- `writer` (`JournalStreamWriter`)