//Send a message with one line of code
   RC.Gmail.GmailMessage.SendFromGmail("username", "password", "toAddress@gmail.com", "subject", "message body");

   //Send a message with one line of code with a MailMessage object
   RC.Gmail.GmailMessage.SendMailMessageFromGmail("username", "password", mailMessageObject);

   //Use the GmailMessage object to create and send your message
   RC.Gmail.GmailMessage gmailMsg = new RC.Gmail.GmailMessage("username", "password");
   gmailMsg.To = "RCcode@gmail.com";
   gmailMsg.From = "fromAddress@gmail.com";
   gmailMsg.Subject = "C# Test Message";
   gmailMsg.Body = "Test body";

   MailAttachment attachment = new MailAttachment(@"c:\testfile.txt");
   gmailMsg.Attachments.Add(attachment);

   gmailMsg.Send();