# RenderContentChangeReason enum

Namespace: [Rhino.Render](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.render.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md) · Since v6.0

```cs
public enum RenderContentChangeReason
```

Enumeration denoting type of change for attach or detach.

## Values

| Name | Value | Description |
| --- | --- | --- |
| None | 0 | No attach or detach change |
| Attach | 1 | Content is being attached by the RhinoDoc.AttachContent() or RenderContent.AttachChild() methods. |
| Detach | 2 | Content is being detached by the RenderContent.DeleteContent() method. |
| ChangeAttach | 3 | Content is being attached while changing. |
| ChangeDetach | 4 | Content is being detached while changing. |
| AttachUndo | 5 | Content is being attached during undo/redo |
| DetachUndo | 6 | Content is being detached during undo/redo. |
| Open | 7 | Content is being attached during open document |
| Delete | 8 | Content is being detached during normal deletion. |