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"IsChecked" boolean attribute is not getting updated for a customized Checklistbox.
Hence INotifyPropertyChanged event is not getting fired for IsChecked property of Checklistbox and if any of the checkboxes are not checked in Checklistbox the NotifyPropertyChanged event is not getting fired for that.
Hence INotifyPropertyChanged event is not getting fired for IsChecked property of Checklistbox and if any of the checkboxes are not checked in Checklistbox the NotifyPropertyChanged event is not getting fired for that.