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

        internal DataRow AddRecords(int oldRecord, int newRecord)
        {
            DataRow row;
            if (oldRecord == -1 && newRecord == -1)
            {
                row = NewRow(-1);
                AddRow(row);
            }
            else
            {
                row = NewEmptyRow();
                row._oldRecord = oldRecord;
                row._newRecord = newRecord;
                InsertRow(row, -1);
            }
            return row;
        }

        internal void CopyRow(DataTable table, DataRow row)
        {
            int oldRecord = -1, newRecord = -1;

            if (row == null)
                return;

            if (row.oldRecord != -1) {
                oldRecord = table.recordManager.ImportRecord(row.Table, row.oldRecord);
            }
            if (row.newRecord != -1) {
                if (row.newRecord != row.oldRecord) {
                    newRecord = table.recordManager.ImportRecord(row.Table, row.newRecord);
                }
                else
                    newRecord = oldRecord;
            }

            DataRow targetRow = table.AddRecords(oldRecord, newRecord);

            if (row.HasErrors) {
                targetRow.RowError = row.RowError;

                DataColumn[] cols = row.GetColumnsInError();

                for (int i = 0; i < cols.Length; i++) {
                    DataColumn col = targetRow.Table.Columns[cols[i].ColumnName];
                    targetRow.SetColumnError(col, row.GetColumnError(cols[i]));
                }
            }

       }