public async void SendEmail(Order order) { var orders = await _instrumentRepository.GetOrdersByOrderNumberAsync(order.OrderNumber); if (orders == null) { return; } var fromAddress = "*****@*****.**"; var toAddress = orders[0].Email; const string fromPassword = "******"; string subject = $"Bill - #{orders[0].OrderNumber}"; string body = $"Thank you for your purchase, {orders[0].FirstName} {orders[0].LastName}!\n\n" + $"Billing City: {orders[0].BillingCity}\nBilling State: {orders[0].BillingState}\nBilling Postal Code: {orders[0].BillingPostalCode}\n" + $"Billing Address: {orders[0].BillingAddress}\n\nHere is your list of order: \n\n"; int total = 0; foreach (var item in orders) { body += $"Instrument: {item.InstrumentName}, Instrument Code: {item.Code}, Quantity: {item.Quantity}, Price: {item.Price.ToString("N0", new CultureInfo("hu-HU"))} Ft\n"; total += item.Price; } body += $"\nTotal: {total.ToString("N0", new CultureInfo("hu-HU"))} Ft\n\nBest regards,\nWebshop team"; SmtpClient Client = new SmtpClient() { Host = "smtp.gmail.com", Port = 587, EnableSsl = true, DeliveryMethod = SmtpDeliveryMethod.Network, UseDefaultCredentials = false, Credentials = new NetworkCredential() { UserName = fromAddress, Password = fromPassword } }; MailAddress FromEmail = new MailAddress(fromAddress, "Webshop"); MailAddress ToEmail = new MailAddress(toAddress, orders[0].FirstName + " " + orders[0].LastName); MailMessage Message = new MailMessage() { From = FromEmail, Subject = subject, Body = body }; Message.To.Add(ToEmail); try { Client.Send(Message); MessageBox.Show("Sent Successfully", "Done"); } catch (Exception e) { MessageBox.Show("Something went wrong \n" + e.InnerException.Message, "Error"); } }