private void OnFilterUnapprovedMenuItemClick(object sender, EventArgs e)
 {
     _currentCommentFilter = CommentsListFilter.Unapproved;
     removeAllcommentsFilters();
     commentsCollectionViewSource.Filter += new System.Windows.Data.FilterEventHandler(FilterUnapproved);
     RefreshAppBar();
 }
 private void OnFilterAllMenuItemClick(object sender, EventArgs e)
 {
     _currentCommentFilter = CommentsListFilter.All;
     removeAllcommentsFilters();
     RefreshAppBar();
 }