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