StonehearthEditor.PreviewCloneDialog.GetUnwantedItems C# (CSharp) Method

        private HashSet<string> GetUnwantedItems()
        {
            HashSet<string> unwantedItems = new HashSet<string>(mSet);
            foreach (object item in dependenciesListBox.CheckedItems)
            {
                unwantedItems.Remove(item.ToString());
            }

            return unwantedItems;
        }