No data is available for encoding 10000

Hi,

I'm trying to develop a send email function with .Net core Web API. Since .Net Core do not support SMTP yet, so I found a 3rd party plug in named MimeMessage to perform my task.

However, I get an System.NotSupportedException error "No data is available for encoding 10000" when I trying to running the code.

Following are my snippet code:

 var emailMessage = new MimeMessage(); //System.NotSupportedException error occurred at here
            email = "destination@gmail.com";
            subject = "Test send email";
            message = "test message";
            emailMessage.From.Add(new MailboxAddress("Send From", "SendFrom@gmail.com"));
            emailMessage.To.Add(new MailboxAddress("", email));
            emailMessage.Subject = subject;
            emailMessage.Body = new TextPart("plain") { Text = message };

Please advise. Thanks.