# GH_ObjectUndoAction class

Namespace: [Grasshopper.Kernel.Undo](https://developer.rhino3d.com/api/gh1/namespace/grasshopper.kernel.undo.md) · Assembly: [Grasshopper](https://developer.rhino3d.com/api/gh1/assembly/grasshopper.md)

```cs
public abstract class GH_ObjectUndoAction : GH_UndoAction
```

Utility base class for undo actions that operate on a single IGH_DocumentObject.

**Derived types:** [GH_Cluster.GH_ClusterDocumentIdAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-cluster.gh-clusterdocumentidaction.md), [GH_Cluster.GH_ClusterPasswordUndoAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-cluster.gh-clusterpasswordundoaction.md), [GH_Cluster.GH_ClusterPreviewDocumentAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-cluster.gh-clusterpreviewdocumentaction.md), [GH_Cluster.GH_ClusterPropertiesUndoAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-cluster.gh-clusterpropertiesundoaction.md), [GH_Cluster.GH_ClusterReferenceAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.special.gh-cluster.gh-clusterreferenceaction.md), [GH_DataMatchingAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-datamatchingaction.md), [GH_DataModificationAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-datamodificationaction.md), [GH_ExpressionUndoAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.parameters.gh-expressionundoaction.md), [GH_HiddenAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-hiddenaction.md), [GH_IconDisplayAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-icondisplayaction.md), [GH_IconOverrideAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-iconoverrideaction.md), [GH_LayoutAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-layoutaction.md), [GH_LockedAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-lockedaction.md), [GH_NickNameAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-nicknameaction.md), [GH_PersistentDataAction<T>](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-persistentdataaction-1.md), [GH_PivotAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-pivotaction.md), [GH_WireDisplayAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.actions.gh-wiredisplayaction.md)

## Constructors

- [GH_ObjectUndoAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-objectundoaction/ctor.md)

## Methods

- [Internal_Redo](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-objectundoaction/internal-redo.md)
- [Internal_Undo](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-objectundoaction/internal-undo.md)
- [Object_Redo](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-objectundoaction/object-redo.md)
- [Object_Undo](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-objectundoaction/object-undo.md)

## Inherited Members

- From [GH_UndoAction](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-undoaction.md): [ExpiresDisplay](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-undoaction/expiresdisplay.md), [ExpiresSolution](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-undoaction/expiressolution.md), [State](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-undoaction/state.md), [Read](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-undoaction/read.md), [Redo](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-undoaction/redo.md), [Undo](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-undoaction/undo.md), [Write](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.undo.gh-undoaction/write.md)