v2 API C# Code Example
We recommend using SendGrid C#, our client library, available on GitHub, with full documentation.
The library does not officially support the V2 API, but you can use V2 with an older version of the library. For more information, see Continue Using V2 in C#.
Using SendGrid's C# Library
// using SendGrid's C# Library - https://github.com/sendgrid/sendgrid-csharp
using System.Net.Http;
using System.Net.Mail;
var myMessage = new SendGrid.SendGridMessage();
myMessage.AddTo("test@sendgrid.com");
myMessage.From = new EmailAddress("you@youremail.com", "First Last");
myMessage.Subject = "Sending with SendGrid is Fun";
myMessage.PlainTextContent= "and easy to do anywhere with C#.";
var transportWeb = new SendGrid.Web("SENDGRID_APIKEY");
transportWeb.DeliverAsync(myMessage);
// NOTE: If you're developing a Console Application,
// use the following so that the API call has time to complete
// transportWeb.DeliverAsync(myMessage).Wait();
Using .NET's Built-in SMTP Library
If you choose not to use SendGrid's client library you may use .NET's built in library.
If you are using ASP.NET, you can specify SMTP settings in web.config. Please note that your username should be "apikey" as specified in "Integrating with the SMTP API". Your password will be your SendGrid API key. For more information about SendGrid API keys, see our API Key documentation. We also have a Twilio blog post to help you learn "How to Set Environment Variables".
<system.net>
<mailSettings>
<smtp from="test@domain.com">
<network host="smtp.sendgrid.net" password="<your_api_key>" userName="apikey" port="587" />
</smtp>
</mailSettings>
</system.net>
This C# program will build a MIME email and send it through SendGrid. .NET already has built in libraries to send and receive emails. This example uses: .NET Mail
using System;
using System.Net;
using System.Net.Mail;
using System.Net.Mime;
namespace SmtpMail
{
internal class Program
{
static void Main(string[] args)
{
using (MailMessage mailMsg = new MailMessage())
{
// API key
string apiKey = Environment.GetEnvironmentVariable("SENDGRID_API_KEY");
// To
mailMsg.To.Add(new MailAddress("to@example.com", "To Name"));
// From
mailMsg.From = new MailAddress("from@example.com", "From Name");
// Subject and multipart/alternative Body
mailMsg.Subject = "subject";
string text = "text body";
string html = @"<p>html body</p>";
mailMsg.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(text, null, MediaTypeNames.Text.Plain));
mailMsg.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(html, null, MediaTypeNames.Text.Html));
// Init SmtpClient and send
using (SmtpClient smtpClient = new SmtpClient("smtp.sendgrid.net", 587))
{
smtpClient.Credentials = new NetworkCredential("apikey", apiKey);
smtpClient.Send(mailMsg);
}
}
}
}
}
Need some help?
We all do sometimes. Get help now from the Twilio SendGrid Support Team.
Running into a coding hurdle? Lean on the wisdom of the crowd by browsing the SendGrid tag on Stack Overflow or visiting Twilio's Stack Overflow Collective.
