public Menu()
        {
            try
            {
                conn = new SqlConnection(_db.db_connect());
                conn.Open();

                pesan = String.Concat("Koneksi ke = ", conn.DataSource, "\n");
                pesan = String.Concat(pesan, "Database = ", conn.Database, "\n");
                pesan = String.Concat(pesan, "WorkStationID = ", conn.WorkstationId, "\n");
                pesan = String.Concat(pesan, "Connection String = ", conn.ConnectionString);
            }
            catch (SqlException ex)
            {
                pesan = String.Concat("Error ", ex.ErrorCode, " : ");
                pesan = String.Concat(pesan, ex.Message);
            }
        }