System.Data.DataTable.GetIndex C# (CSharp) Method

        internal Index GetIndex(IndexField[] indexDesc, DataViewRowState recordStates, IFilter rowFilter)
        {
            _indexesLock.EnterUpgradeableReadLock();
            try
            {
                for (int i = 0; i < _indexes.Count; i++)
                {
                    Index index = _indexes[i];
                    if (index != null)
                    {
                        if (index.Equal(indexDesc, recordStates, rowFilter))
                        {
                            return index;
                        }
                    }
                }
            }
            finally
            {
                _indexesLock.ExitUpgradeableReadLock();
            }
            Index ndx = new Index(this, indexDesc, recordStates, rowFilter);
            ndx.AddRef();
            return ndx;
        }