net9.0 
namespace System.Net.Mail
{
    [UnsupportedOSPlatform("browser")]
    public class SmtpClient : IDisposable
    {
        public Task! SendMailAsync(MailMessage! message, CancellationToken cancellationToken);
    }
}
Design Reviews
.NET
5.06.07.08.09.0
Information specific to net9.0
Assembly

System.Net.Mail , Version=9.0.0.0, PublicKeyToken=cc7b13ffcd2ddd51

Referencing

The API is automatically referenced.

Platform Restrictions

This API is supported on any platform except for these:

  • Browser
  • Built-in API
  • Package-provided API