不支持的列数据类型几何

Question

由于几何列，我得到了一个不受支持的列数据类型错误。

我尝试使用EF，EFCORE和其他软件包。这些都不起作用

    static void Main(string[] args)
    {
        string connectionString = "" - left empty on purpose
        string queryString =
            "SELECT GEOMETRY as geom FROM FOLIO_EXCL_MAP_OBJ WHERE MAP_OBJ_ID IN (SELECT MAP_OBJ_ID FROM PARCEL_INFO WHERE FOLIO_ENTRY_ID IN (SELECT FOLIO_ENTRY_ID FROM FOLIO_ENTRY WHERE FOLIO_ID = 1))";
        using (OracleConnection connection =
                   new OracleConnection(connectionString))
        {
            OracleCommand command = connection.CreateCommand();
            command.CommandText = queryString;

            try
            {
                connection.Open();

                OracleDataReader reader = command.ExecuteReader();

                while (reader.Read())
                {
                    Console.WriteLine("\t{0}\t{1}",
                        reader[0], reader[1]);
                }
                reader.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }

我希望能够使用几何类型。我目前不能