Catrobat.IDE.WindowsPhone.Controls.ListsViewControls.CatrobatListView.CatrobatListViewMisc.CatrobatListViewWorker.TransferItemsSource C# (CSharp) Method

        private void TransferItemsSource(IList source)
        {
            if (source == null || Items == null)
            {
                return;
            }

            for (int i = Items.Count - 1; i >= 0; i--)
            {
                if (source.Contains(Items[i]) == false)
                {
                    Items.RemoveAt(i);
                }
            }

            for (int i = 0; i < source.Count; i++)
            {
                int tmpTargetIndex = Items.IndexOf(source[i]);
                if (source[i] != null && tmpTargetIndex != i)
                {
                    if (tmpTargetIndex != -1)
                    {
                        Items.RemoveAt(Items.IndexOf(source[i]));
                    }
                    Items.Insert(i, source[i]);
                }
            }
        }