I am working on a page with two tables: one to show all the items, and one to show only the selected items. An item can added to/removed from the selected list by a checkbox in either table that is bound to a boolean in the view models. The view models notify other entities in the page that an item has been selected or deselected by way of a delegate that is passed in on construction of the view model:

public bool ItemViewModel.Selected
{
     get { return this.selected; }
     set
     {
          if (this.itemSelectedChangedHandler != null && value != this.selected)
          {
               this.selected = value;
               this.itemSelectedChangedHandler(this.item, this.selected);
          }
     }
}

When an item is selected/deselected, the selected list will update by hiding non-selected items and showing selected items. It will also call a method to set the selected value of the view model without invoking the itemSelectedChangedHandler:

private void PageViewModel.UpdateSelectedItemsTable()
{
     foreach (var row in this.selectedItemsTable.Rows)
     {
          var itemViewModel = row.ListObject as ItemViewModel;

          if (this.dataModule.SelectedItems.Contains(itemViewModel.Item))
          {
               itemViewModel.Select(true);
               itemViewModel.UpdateChildren();
               row.ExpandAll();
               row.Hidden = false;
          }
          else
          {
               itemViewModel.Select(false);
               row.CollapseAll();
               row.Hidden = true;
          }
     }

}

public void ItemViewModel.Select(bool selected)
{
     if (this.selected != selected)
     {
          this.selected = selected;
          this.OnPropertyChanged(nameof(this.Selected));
     }
}

I can successfully select and deselect items from the table of all items (which has a different view model but ends up calling the same UpdateSelectedItemsTable), however, when I try to deselect an item from the selected table, I can deselect the first item, but subsequent items will not enter into their set accessors when I click their checkbox. To make debugging even more confusing, if I have a breakpoint on the set accessor from the beginning, before I select or deselect any items, I can successfully deselect all items by clicking their checkbox in the selected items table. I have no idea why the same code would have different outcomes when I step through it and when I don't.

Any thoughts or suggestions would be appreciated at this point!

Thank you!