如何更改代码以读取已经通过IDataReader编写的linq结果

Question

正在处理已经构建的应用程序代码，现在可以使用Entity framework（oracle）在相似的行上工作。更改以下代码时遇到的问题

// Already Written Code

private static IEnumerable<IEnumerable<T>> ExecuteReader1(
    IDbCommand command, List<IMapper<T>> mappers)
{
    var listOfList = new List<IEnumerable<T>>();

    //Here i have written code to fetch the data using LINQ (Entity Framework with Oracle)

    using (var reader = command.ExecuteReader(CommandBehavior.CloseConnection))
    {
        foreach (var mapper in mappers)
        {
            List<T> list;
            ReadResultset(reader, mapper, out list);
            listOfList.Add(list);

            if (!reader.NextResult())
                break;
        }
    }

    return listOfList;
}

private static void ReadResultset(IDataReader reader, IMapper<T> mapper, out List<T> list)
{
    list = new List<T>();

    while (reader.Read())
    {
        var item = new T();
        mapper.Map(reader, item);
        list.Add(item);
    }
}

问题：如何更改上面的代码，因为现在结果将在Linq中。请告诉最佳做法