FastQuery, a convenient way to run raw SQL queries in C#

FastQuery.cs

// Apache 2.0 license...  This code might not work at all.

        /// <summary>
        /// Must reference parameters in the query positionally, starting with @p0.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="query">example is "select foo from bar where frob = @p0 and quux = @p1"</param>
        /// <param name="selector">
        ///     function that (usually) builds a new T from a database row-reader
        /// </param>
        /// <param name="parameterValues">values to substitute for the @p-parameters</param>
        /// <returns>enumeration of the return values from selector</returns>
        private IEnumerable<T> FastQuery<T>(string query,
            Func<DbDataReader, T> selector, params object[] parameterValues)
        {
            var result = new List<T>();  // @TODO use yield pattern instead
            var conn = GetDbConnection();
            using (var command = conn.CreateCommand())
            {
                for (var i = 0; i < parameterValues.Length; i++)
                {
                    var parm = command.CreateParameter();
                    parm.ParameterName = "@p" + i;
                    parm.Value = parameterValues[i];
                    command.Parameters.Add(parm);
                }

                command.CommandText = query;
                var reader = command.ExecuteReader();

                if (reader.HasRows)
                {
                    while (reader.Read())
                    {
                        var row = selector(reader);
                        result.Add(row);
                        // @TODO yield return instead
                    }
                }
                reader.Dispose();
            }

            return result;  // @TODO use yield pattern instead
        }