# serializationIndex

> Order in which the object will be serialized to disk.

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor.Build.Content](/engine/6000.7/script-reference/unityeditor/build/content.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public long serializationIndex { get; set; }
```

### Remarks

Internal use only. See [SerializationInfo](/engine/6000.7/script-reference/unityeditor/build/content/serializationinfo.md).