# JsonDurableSetCommandCodec<T>.WriteAdd(T, JournalStreamWriter)

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

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Journaling/Formats/Json/JsonDurableCollectionCommandCodecs.cs#L286-L294)

```csharp
public void WriteAdd(T item, JournalStreamWriter writer)
```

Writes an add command.

### Parameters

- `item` (`T`)
- `writer` (`JournalStreamWriter`)