public override byte[] toBinary()
    {
        writer = new st.net.NetBase.ByteWriter();
        writer.write_int(id);
        writer.write_byte(type);
        writer.write_int(rest_time);
        writer.write_str(desc);
        writer.write_int(counter_value);
        ushort lendetails = (ushort)details.Count;

        writer.write_short(lendetails);
        for (int i_details = 0; i_details < lendetails; i_details++)
        {
            st.net.NetBase.operation_activity_detail_info listData = details[i_details];
            listData.toBinary(writer);
        }
        return(writer.data);
    }