# AddCustomUISections class

Namespace: [Rhino.Render](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.render.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md)

```cs
public static class AddCustomUISections
```

This class contains the event to add custom ui sections when the content ui is created.

## Events

- [OnAddCustomUISections](https://developer.rhino3d.com/api/rhinocommon/type/rhino.render.addcustomuisections/onaddcustomuisections.md): (static) This event is raised when a OnAddCustomUISections Event is triggered in rdk.