C#获取硬盘ID

    class HardDrive
    {
        private string model = null;
        private string type = null;
        private string serialNo = null;

        public string Model
        {
            get { return model; }
            set { model = value; }
        }

        public string Type
        {
            get { return type; }
            set { type = value; }
        }

        public string SerialNo
        {
            get { return serialNo; }
            set { serialNo = value; }
        }
    }

        public static string GetDiskSerialNumber()
        {
            string DiskID="";
            ArrayList hdCollection = new ArrayList();

            ManagementObjectSearcher searcher = new
                ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive");

            foreach (ManagementObject wmi_HD in searcher.Get())
            {
                HardDrive hd = new HardDrive();
                hd.Model = wmi_HD["Model"].ToString();
                hd.Type = wmi_HD["InterfaceType"].ToString();

                hdCollection.Add(hd);
            }

            searcher = new
                ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia");

            int i = 0;
            foreach (ManagementObject wmi_HD in searcher.Get())
            {
                // get the hard drive from collection
                // using index
                HardDrive hd = (HardDrive)hdCollection[i];

                // get the hardware serial no.
                if (wmi_HD["SerialNumber"] == null)
                    hd.SerialNo = "None";
                else
                    hd.SerialNo = wmi_HD["SerialNumber"].ToString();

                ++i;
            }

            // Display available hard drives
            foreach (HardDrive hd in hdCollection)
            {
                //Console.WriteLine("Model\t\t: " + hd.Model);
                //Console.WriteLine("Type\t\t: " + hd.Type);
                //Console.WriteLine("Serial No.\t: " + hd.SerialNo);
                //Console.WriteLine();

                DiskID=DiskID+ hd.SerialNo.Trim();//可能有多个硬盘，所以ID长度不一样

            }

            return DiskID;
        }