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UndoEngine.UndoUnit Class

Encapsulates a unit of work that a user can undo.

Namespace:  System.ComponentModel.Design
Assembly:  System.Design (in System.Design.dll)

protected class UndoUnit

The UndoEngine.UndoUnit class is a nested class within UndoEngine that encapsulates an action that a user can undo. The default UndoEngine.UndoUnit implementation monitors change notifications and builds up a list of events for each change. It saves these events using IDesignerSerializationService. An UndoEngine.UndoUnit receives event notifications for changes directly from UndoEngine through several public virtual methods. You can derive from UndoEngine.UndoUnit and perform any additional logic. If desired, you can completely bypass the default UndoEngine.UndoUnit implementation.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0