# Sandbox.SerializedProperty.CustomizableSerializedProperty.AddAttribute

```csharp
void AddAttribute(System.Attribute attribute)
```

Append an extra attribute visible to the editor and control widgets.

### Parameters

- `attribute` (`System.Attribute`)

Declared in [Sandbox.SerializedProperty.CustomizableSerializedProperty](/api/Sandbox.SerializedProperty.CustomizableSerializedProperty).
Assembly: `Sandbox.System`.