protected int GetIndexBySort(T item)
{
if (comparer != null)
{
return(ListHelper.BinarySearch(items, item, comparer));
}
return(Contains(item) ? IndexOf(item) : -(items.Count + 1));
}
protected int GetIndexForAdding(T item)
{
if (comparer != null)
{
var index = ListHelper.BinarySearch(items, item, comparer);
return(CheckUnique ? index : -Math.Abs(index));
}
return(CheckUnique
? Contains(item) ? IndexOf(item) : -(items.Count + 1)
: -(items.Count + 1));
}