获取MAC地址

public static string GetMacByIPConfig()
{
string sMac = string.Empty;
ProcessStartInfo startInfo = new ProcessStartInfo("ipconfig", "/all");
startInfo.UseShellExecute = false;
startInfo.RedirectStandardInput = true;
startInfo.RedirectStandardOutput = true;
startInfo.RedirectStandardError = true;
startInfo.CreateNoWindow = true;
Process p = Process.Start(startInfo);
//截取输出流
StreamReader reader = p.StandardOutput;
string line = reader.ReadLine();

while (!reader.EndOfStream)
{
if (!string.IsNullOrEmpty(line))
{
line = line.Trim();

if (line.StartsWith("Physical Address") || line.StartsWith("物理地址"))
{
sMac = line.Substring(line.IndexOf(":") + 1, line.Length - line.IndexOf(":") - 1).Replace("-", ":");
break;
}
}

line = reader.ReadLine();
}

//等待程序执行完退出进程
p.WaitForExit();
p.Close();
reader.Close();

return sMac.Trim();
}