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How to enable undo or redo in WPF Diagram (SfDiagram)?
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WPF Diagram (SfDiagram) provides support to Undoable Constraint. This Undoable Constraints will not be in default Constraints. Please refer the following code example to enable Undo or Redo support in WPF Diagram (SfDiagram).
C#
IGraphInfo graphinfo = diagram.Info as IGraphInfo; // Enable Undo/Redo diagram.Constraints = GraphConstraints.Default | GraphConstraints.Undoable;