public class MessageData
    {
        [MapField("ID")]
        public Int64 ID;

        [MapField("CALL_ID")]
        public string CallID;
    }

    OracleDataProvider p = new OracleDataProvider();
    p.ParameterPrefix = null;
    DbManager.AddDataProvider(p);
    DbManager.AddConnectionString("Oracle", "Data Source=alias;User ID=user;Password=password;");

    MessageData msg = new MessageData();
    msg.CallID = "lsakxnsaljknsalk";

    using(DbManager db = new DbManager())
    {
        db
            .SetCommand(@"
                      INSERT INTO SUP_AUDIO_MESSAGE
                            ( ID, CALL_ID ) 
                      VALUES 
                            ( SUP_AUDIO_SEQ.NEXTVAL, :CALL_ID )
                      RETURNING ID INTO :ID", 
                  db.CreateParameters(msg))
      .ExecuteNonQuery();
    }

OE> using(DbManager db = new DbManager())
OE>    {
OE>        db
OE>            .SetCommand(@"
OE>                      INSERT INTO SUP_AUDIO_MESSAGE
OE>                            ( ID, CALL_ID ) 
OE>                      VALUES 
OE>                            ( SUP_AUDIO_SEQ.NEXTVAL, :CALL_ID )
OE>                      RETURNING ID INTO :ID", 
OE>                  db.CreateParameters(msg))
OE>      .ExecuteNonQuery();
OE>    }
OE>

using(DbManager db = new DbManager())
{
    db
        .SetCommand(@"
                    INSERT INTO SUP_AUDIO_MESSAGE
                        ( ID, CALL_ID ) 
                    VALUES 
                        ( SUP_AUDIO_SEQ.NEXTVAL, :CALL_ID )
                    RETURNING ID INTO :ID", 
                db.CreateParameters(msg, new string[] { "ID" }, null, null))
        .ExecuteNonQuery(msg);
}