Npgsql.NpgsqlConnection.Close C# (CSharp) Method

        public override void Close()
        {
            NpgsqlEventLog.LogMethodEnter(LogLevel.Debug, CLASSNAME, "Close");

            if (connector == null)
                return;

            if (promotable != null && promotable.InLocalTransaction)
            {
                _postponingClose = true;
                return;
            }

            ReallyClose();
        }

        public static void getWords()
        {
            #region Npgsql
            NpgsqlConnection conn;
            conn = new NpgsqlConnection("Server=" + Settings.DBSrvIP + ";Port=" + Settings.DBSrvPort + ";User Id=" +
                Settings.DBconnectID + ";Password="******";Database=endoDB;" + Settings.sslSetting);

            try
            {
                conn.Open();
            }
            catch (NpgsqlException)
            {
                MessageBox.Show(Properties.Resources.CouldntOpenConn, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                conn.Close();
            }
            catch (System.IO.IOException)
            {
                MessageBox.Show(Properties.Resources.ConnClosed, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                conn.Close();
            }
            #endregion

            string sql = "SELECT no, words1, words2, words3, operator, word_order FROM words ORDER BY word_order";

            NpgsqlDataAdapter da = new NpgsqlDataAdapter(sql, conn);
            da.Fill(localDB, "words");
            if (localDB.Tables["words"].Rows.Count == 0)
            { MessageBox.Show("[words]" + Properties.Resources.NoRecord, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); }
            conn.Close();
        }