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UndoEngine.CreateUndoUnit Method

Creates a new UndoEngine.UndoUnit.

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

protected virtual UndoEngine.UndoUnit CreateUndoUnit(
	string name,
	bool primary


Type: System.String

The name of the unit to create.

Type: System.Boolean

true to create the first of a series of nested units; false to create subsequent nested units.

Return Value

Type: System.ComponentModel.Design.UndoEngine.UndoUnit
A new UndoEngine.UndoUnit with a specified name.

The default implementation of the CreateUndoUnit method simply returns a new UndoEngine.UndoUnit.

By default, UndoEngine does nothing with the primary parameter, but some implementations of undo, such as those involving the COM Microsoft.VisualStudio.OLE.Interop.IOleParentUndoUnit design pattern, may need to identify the difference between a primary unit and its children.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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