private ColumnMapper generateColumnMapper(FeatureDataTable schemaModel)
        {
            Int32 targetCount = _targetDataTable.Columns.Count;
            Int32 sourceCount = schemaModel.Columns.Count;

            ColumnMapper mapper = new ColumnMapper(sourceCount, targetCount);

            foreach (DataColumn column in schemaModel.Columns)
            {
                int trgtOrdinal = _targetDataTable.Columns[column.ColumnName].Ordinal;
                if (trgtOrdinal == -1 && (_mergeAction & SchemaMergeAction.CaseInsensitive) != SchemaMergeAction.None)
                {
                    foreach (DataColumn c in _targetDataTable.Columns)
                    {
                        if (String.Compare(c.ColumnName, column.ColumnName, StringComparison.CurrentCultureIgnoreCase) == 0)
                        {
                            trgtOrdinal = c.Ordinal;
                            break;
                        }
                    }
                }

                mapper.AddMapping(column.Ordinal, trgtOrdinal);
            }

            return mapper;
        }