System.Data.Common.DbCommandBuilder.GetSelectCommand C# (CSharp) Method

        private DbCommand GetSelectCommand()
        {
            DbCommand select = null;
            DbDataAdapter adapter = DataAdapter;
            if (null != adapter)
            {
                if (0 == _missingMappingAction)
                {
                    _missingMappingAction = adapter.MissingMappingAction;
                }
                select = adapter.SelectCommand;
            }
            if (null == select)
            {
                throw ADP.MissingSourceCommand();
            }
            return select;
        }