private void MManagerOnActiveContentChanged(object _sender, EventArgs _eventArgs) { PropertyChanged.Cast(this, () => ActivePage); PropertyChanged.Cast(this, () => ForwardCommand); PropertyChanged.Cast(this, () => BackCommand); PropertyChanged.Cast(this, () => CloseCommand); PropertyChanged.Cast(this, () => RevertCommand); PropertyChanged.Cast(this, () => UndoCommand); PropertyChanged.Cast(this, () => RedoCommand); PropertyChanged.Cast(this, () => SaveCommand); if (ActivePage != null) { ActivePage.Selected(); } }