using System.IO;
using System.Net;
using System.Net.Mail;
 
namespace MonitorDiskspace
{
    class Program
    {
        private static bool CheckTotalFreeSpaceRate(string driveName)
        {
            foreach (DriveInfo drive in DriveInfo.GetDrives())
            {
                if (drive.IsReady && drive.Name == driveName)
                    return (drive.TotalFreeSpace * 100 / drive.TotalSize) < 15;
            }
            return false;
        }
 
        private static void SendEmail(string drive)
        {
            MailMessage message = new MailMessage();
            message.To.Add("AppSupport@company.com");
            message.Subject = "Alert!!! Disk Almost full";
            message.From = new MailAddress("AppSupport@company.com");
            message.Body = "Your hard disk with Letter: " + drive + " is almost full, please replace the disk or cleanup!";
            SmtpClient client = new SmtpClient("MailServer.company.com")
            {
                EnableSsl = false
            };
 
            client.Send(message);
        }
 
        static void Main(string[] args)
        {
            string drive = @"C:\";
            if (CheckTotalFreeSpaceRate(drive))
            {
                SendEmail(drive);
            }
        }
    }
}