lista_bases_pg

            NpgsqlConnection conn = new NpgsqlConnection();
            conn.ConnectionString = "Server = localhost;Port = 5432;User Id=USERNAME;Password=PASSWORD;Database=postgres;CommandTimeout=1800000;Pooling=false;Timeout=1024;";
            conn.Open();
            NpgsqlDataReader dataset = new NpgsqlCommand("select datname from pg_database where not datistemplate", conn).ExecuteReader();
            while (dataset.Read())
            {
                comboBox1.Items.Add(dataset.GetString(0));
            }
            dataset.Close();
            dataset.Dispose();