用ASP.Net获取客户端网卡的MAC

using System.Text.RegularExpressions;
using System.Diagnostics;
public class test
{
  public test
  {}
  public static string GetCustomerMac(string IP) //para IP is the client's IP 
  { 
string dirResults=""; 
ProcessStartInfo psi  = new ProcessStartInfo(); 
Process proc = new Process(); 
psi.FileName = "nbtstat"; 
psi.RedirectStandardInput = false; 
psi.RedirectStandardOutput = true; 
psi.Arguments = "-A " + IP; 
psi.UseShellExecute = false; 
proc = Process.Start(psi); 
dirResults = proc.StandardOutput.ReadToEnd(); 
proc.WaitForExit(); 
dirResults=dirResults.Replace("\r","").Replace("\n","").Replace("\t","");

Regex reg=new Regex("Mac[ ]{0,}Address[ ]{0,}=[ ]{0,}(?<key>((.)*?)) __MAC",RegexOptions.IgnoreCase|RegexOptions.Compiled); 
Match mc=reg.Match(dirResults+"__MAC");

if(mc.Success) 
{ 
 return mc.Groups["key"].Value; 
  } 
else 
  { 
 reg=new Regex("Host not found",RegexOptions.IgnoreCase|RegexOptions.Compiled); 
 mc=reg.Match(dirResults); 
if(mc.Success) 
{ 
  return "Host not found!"; 
} 
else 
{ 
  return ""; 
} 
 }
  }
}