C# - Send Mail BCC to multiple Recipients

You can have multiple addresses separated by semicolon:
string emailBcc = "me@napapen.com;info@napapen.com";
 if (string.IsNullOrEmpty(emailBcc) == false)
 {
     string[] arrMailerBcc = emailBcc.Split(new char[] { ';' });
     if (arrMailerBcc.Length > 0)
     {
        foreach (string mailerBccValue in arrMailerBcc)
        {
              if (!string.IsNullOrEmpty(mailerBccValue))
                 mail.Bcc.Add(new MailAddress(mailerBccValue, mailerBccValue));
        }
     }else{
        mail.Bcc.Add(new MailAddress(emailBcc, emailBcc));
     }
 }