# C1.WPF.RichTextBox.Documents.DocumentHistory ## Content

DocumentHistory Class

Manages the history of actions performed in a document, and provides undo and redo for this actions.

DocumentHistory

public class DocumentHistory

Public Class DocumentHistory

Name	Description
CanRedo	Returns whether there is an action to redo.
CanUndo	Returns whether there is an action to undo.
Ignore	Gets or sets a value that indicates whether the action is stored in DocumentHistory or not when change the document.

Name	Description
BeginGroup()	Begin an action group, all actions performed in a group are undone together.
Clear()	Clear the history of actions.
EndGroup()	End an action group, see BeginGroup().
Redo()	Redo the last undone action.
Undo()	Undo the last action performed on the document.

Name	Description
HistoryChanged	Fired when the history changes, that is, the list of actions to undo or redo changed.