# GH_UpgradeComponentControl class

Namespace: [Grasshopper.GUI](https://developer.rhino3d.com/api/gh1/namespace/grasshopper.gui.md) · Assembly: [Grasshopper](https://developer.rhino3d.com/api/gh1/assembly/grasshopper.md)

```cs
public class GH_UpgradeComponentControl : GH_DoubleBufferedPanel
```

Control used to display a collection of IGH_UpgradeObjects.

## Properties

- [Document](https://developer.rhino3d.com/api/gh1/type/grasshopper.gui.gh-upgradecomponentcontrol/document.md): Gets or sets the document that needs to be upgraded.
- [Upgraders](https://developer.rhino3d.com/api/gh1/type/grasshopper.gui.gh-upgradecomponentcontrol/upgraders.md): Gets a list of all selected upgraders.

## Methods

- [OnPaint](https://developer.rhino3d.com/api/gh1/type/grasshopper.gui.gh-upgradecomponentcontrol/onpaint.md)
- [OnPaintBackground](https://developer.rhino3d.com/api/gh1/type/grasshopper.gui.gh-upgradecomponentcontrol/onpaintbackground.md)
- [PopulateTooltip](https://developer.rhino3d.com/api/gh1/type/grasshopper.gui.gh-upgradecomponentcontrol/populatetooltip.md)