/// <summary>

        /// 获取CPU频率

        /// </summary>

        /// <returns></returns>

        public string GetCpuGHZ()

        {

            ManagementClass mc = new ManagementClass("Win32_Processor");

            ManagementObjectCollection cpus = mc.GetInstances();

            string str = "";

            string[] mHz = new string[cpus.Count];

            int c = ;

            ManagementObjectSearcher mySearch = new ManagementObjectSearcher("select * from Win32_Processor");

            foreach (ManagementObject mo in mySearch.Get())

            {

                double temp = Convert.ToInt64(mo.Properties["CurrentClockSpeed"].Value);

                mHz[c] = temp.ToString();

                str += (temp/).ToString("0.00") + "GHz,";

                c++;

            }

            mc.Dispose();

            mySearch.Dispose();

            // return mHz;

            return str.TrimEnd(',');

        }

        /// <summary>

        /// 获取内存大小

        /// </summary>

        /// <returns></returns>

        public string GetTotalPhysicalMemory()

        {

            try

            {

                string st = " ";

                ManagementClass mc = new ManagementClass("Win32_ComputerSystem");

                ManagementObjectCollection moc = mc.GetInstances();

                foreach (ManagementObject mo in moc)

                {

                    st = mo["TotalPhysicalMemory"].ToString();

                }

                moc = null;

                mc = null;

                return st;

            }

            catch

            {

                return "";

            }

            finally

            {

            }

        }

        /// <summary>

        /// 硬盘大小

        /// </summary>

        /// <returns></returns>

        public string GetSizeOfDisk()

        {

            ManagementClass mc = new ManagementClass("Win32_DiskDrive");

            ManagementObjectCollection moj = mc.GetInstances();

            foreach (ManagementObject m in moj)

            {

                return m.Properties["Size"].Value.ToString();

            }

            return "";

        }