Method not found: 'Void MailKit.MailTransport.Send(MimeKit.MimeMessage, System.Threading.CancellationToken, MailKit.ITransferProgress)'.

[neozhu]

services.AddFluentEmail(mailSettings.From)
.AddRazorRenderer()
// this configuration is working
.AddSmtpSender(new System.Net.Mail.SmtpClient()
{
Host = mailSettings.Host,
Port = mailSettings.Port,
EnableSsl = mailSettings.UseSsl,
Credentials = new System.Net.NetworkCredential(mailSettings.UserName, mailSettings.Password)
});
// this configuration with Mailkit not working.
//.AddMailKitSender(new FluentEmail.MailKitSmtp.SmtpClientOptions()
//{
// RequiresAuthentication = !string.IsNullOrEmpty(mailSettings.UserName),
// UsePickupDirectory = false,
// Password = mailSettings.Password,
// Port = mailSettings.Port,
// Server = mailSettings.Host,
// User = mailSettings.UserName,
// UseSsl = mailSettings.UseSsl,
//});

Method not found: 'Void MailKit.MailTransport.Send(MimeKit.MimeMessage, System.Threading.CancellationToken, MailKit.ITransferProgress)'.
why?

[ghost]

Yes. I have exact same issue. I'm very surprised that the author @lukencode has not responded at all since April. I guess it's time not to use this nugget packages

[tigrin]

For me, this issue happens when I have MailKit version 3.0.0 or greater installed.

It looks like MailKit 3.0.0 changed the signature to return a string instead of a void. Link to commit

[AdisonCavani]

This is a duplicate of #296
You can close the issue and move this conversation to issue above.