DbDataReader.NextResult With Generic Lists ?

 Hey I'm using this DAL to populate a generic list called assetDetailList
However I'm adding a 2nd result set to my stored proc,

protected void GenerateAssetDetails<T>(DbDataReader dataReader, ref List<AssetDetails> assetDetailList)
        {
            while (dataReader.Read())
            {

                    // Create a new culture
                    AssetDetails assetDetail = new AssetDetails();
                    // Set the culture properties
                  
                    assetDetail.FileName = dataReader.GetString(dataReader.GetOrdinal("filename"));
                    assetDetail.Title = dataReader.GetString(dataReader.GetOrdinal("title"));
                    assetDetail.AltTag = dataReader.GetString(dataReader.GetOrdinal("alt_tag"));
                    assetDetailList.Add(assetDetail);

                    dataReader.NextResult();
// this is the 2nd result set

               AssetContent assetContent = new AssetContent();
               assetContent.content_id = dataReader.GetInt32(dataReader.GetOrdinal("content_id"));
             how do I creatre another  list .Add(assetContent);

            }
            // Close and dispose of the reader
            dataReader.Close();
            dataReader.Dispose();
        }

        #endregion
    }