public void send_email_via_outlook(bool battach, string filepath)
{
     try
     {
          Microsoft.Office.Interop.Outlook.Application outlookObj = new Microsoft.Office.Interop.Outlook.Application();
          Outlook.MailItem mailItem = (Outlook.MailItem) outlookObj.CreateItem(Outlook.01ItemType.ol.MailItem);
          mailItem.Subject = "This is the subject";
          mailItem.To = "someone@example.com";
          mailItem.Body = "This is the message.";

          if(battach==true)
            MailItem.Attachments.Add(filepath);//logPath is a string holding path to the log.txt file

          mailItem.Display(false);
     }
     catch (Exception ex)
     {

     }