System.Data.ProviderBase.SchemaMapping.LoadDataRowChapters C# (CSharp) Method

        internal int LoadDataRowChapters(DataRow dataRow)
        {
            int datarowadded = 0;

            int rowLength = _chapterMap.Length;
            for (int i = 0; i < rowLength; ++i)
            {
                if (_chapterMap[i])
                {
                    object readerValue = _readerDataValues[i];
                    if ((null != readerValue) && !Convert.IsDBNull(readerValue))
                    {
                        _readerDataValues[i] = null;

                        using (IDataReader nestedReader = (IDataReader)readerValue)
                        {
                            if (!nestedReader.IsClosed)
                            {
                                Debug.Assert(null != _dataSet, "if chapters, then Fill(DataSet,...) not Fill(DataTable,...)");

                                object parentChapterValue;
                                DataColumn parentChapterColumn;
                                if (null == _indexMap)
                                {
                                    parentChapterColumn = _dataTable.Columns[i];
                                    parentChapterValue = dataRow[parentChapterColumn];
                                }
                                else
                                {
                                    parentChapterColumn = _dataTable.Columns[_indexMap[i]];
                                    parentChapterValue = dataRow[parentChapterColumn];
                                }

                                // correct on Fill, not FillFromReader
                                string chapterTableName = _tableMapping.SourceTable + _fieldNames[i];

                                DataReaderContainer readerHandler = DataReaderContainer.Create(nestedReader, _dataReader.ReturnProviderSpecificTypes);
                                datarowadded += _adapter.FillFromReader(_dataSet, null, chapterTableName, readerHandler, 0, 0, parentChapterColumn, parentChapterValue);
                            }
                        }
                    }
                }
            }
            return datarowadded;
        }