C#-获取CPUID

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.IO;

namespace T
{
    class GetCpuid
    {
        public string Getid()
        {
            try
            {
                string Str = InvokeCmd("@wmic cpu get processorId > c:\\tmpp.txt");
                StreamReader sr = new StreamReader(@"c:\tmpp.txt", Encoding.Default);
                string s, Id = "null";
                int mk = 0;
                while ((s = sr.ReadLine()) != null)
                {
                    mk++;
                    if (mk == 2) Id = s;
                }
                sr.Close();
                InvokeCmd("del  c:\\tmpp.txt");
                Id = Id.Trim();
                return Id;
            }
            catch
            {
                return "null";
            }

        }

        private  string InvokeCmd(string cmdArgs)
        {
            string Tstr = "";
            Process p = new Process();
            p.StartInfo.FileName = "cmd.exe";
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardInput = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.CreateNoWindow = true;
            p.Start();

            p.StandardInput.WriteLine(cmdArgs);
            p.StandardInput.WriteLine("exit");
            Tstr = p.StandardOutput.ReadToEnd();
            p.Close();
            return Tstr;
        }
    }
}