private void UniqueTitles()
{
var libItemsCount = lvLibItems.Items.Count;
double step = libItemsCount / 100;
pbLoadUniqueData.Step = (int)step;
var time = DateTime.Now;
log.Write($"{ time.ToString() }");
log.Write($"> Find unique where libItems count = {lvLibItems.Items.Count} ");
// var unique = new Unique(lvLibItems.Items.Cast<ListViewItem>().Select(item => (LibItem)item.Tag).ToList());
var unique = new Unique(libItems);
var uniqueItems = unique.GetUnique();
deletedLibItems.AddRange(libItems.Except(uniqueItems).ToList());
libItems = uniqueItems;
LoadLibItems();
log.Write($"{ (DateTime.Now - time).TotalSeconds.ToString() } sec.");
log.Write("____________________");
pbLoadUniqueData.Value = 100;
MessageBox.Show("Готово!");
pbLoadUniqueData.Value = 0;
}