NpgSQL C#

            var builder = new NpgsqlConnectionStringBuilder
            {
                Username = "dyncedlninyqrz",
            Password = "5e92c4cc539d3c48d6c542f3e3a56883106440bffe1c2693c1bff69062070732",
            Host = "ec2-46-51-184-229.eu-west-1.compute.amazonaws.com",
            Port = 5432,
            Database = "d86q4npnbodu6d",
            SslMode = SslMode.Require,
            TrustServerCertificate = true
            };

            using (var conn = new NpgsqlConnection(builder.ConnectionString))
            {
                conn.Open();

                using (var cmd = new NpgsqlCommand())
                {
                    cmd.Connection = conn;
                    cmd.CommandText = "CREATE TABLE XYZ (A INT, B INT)";
                    cmd.ExecuteNonQuery();
                }
                using (var cmd = new NpgsqlCommand())
                {
                    cmd.Connection = conn;
                    cmd.CommandText = "INSERT INTO XYZ VALUES (2, 3), (4, 3)";
                    cmd.ExecuteNonQuery();
                }

                using (var cmd = new NpgsqlCommand("SELECT * FROM XYZ", conn))
                using (var reader = cmd.ExecuteReader())
                {
                    while (reader.Read())
                        Console.WriteLine(reader.GetInt32(0) + " " + reader.GetInt32(1));
                }
            }
            Console.ReadKey();