PdfVisualAnnotationStateChangeEventArgs.AllowStateChange Property
Gets or sets a value indicating whether the state change is allowed.
Property Value
True if state change is allowed, false otherwise. Default is true.
Remarks
You can set this property to false in !:PdfAnnotationsView.BeforeReviewStateChange and/or !:PdfAnnotationsView.BeforeCheckmarkChange to reject the state change.
This property is not used in !:PdfAnnotationsView.AfterReviewStateChange and !:PdfAnnotationsView.AfterCheckmarkChange events.