System.Data.Select.FindSortIndex C# (CSharp) Method

        private bool FindSortIndex()
        {
            _index = null;
            _table._indexesLock.EnterUpgradeableReadLock();
            try
            {
                int count = _table._indexes.Count;
                int rowsCount = _table.Rows.Count;
                for (int i = 0; i < count; i++)
                {
                    Index ndx = _table._indexes[i];
                    if (ndx.RecordStates != _recordStates)
                        continue;
                    if (!ndx.IsSharable)
                    {
                        continue;
                    }
                    if (CompareSortIndexDesc(ndx._indexFields))
                    {
                        _index = ndx;
                        return true;
                    }
                }
            }
            finally
            {
                _table._indexesLock.ExitUpgradeableReadLock();
            }
            return false;
        }