获取MAC地址。。。。。。。。。

System.Diagnostics.Process p = new System.Diagnostics.Process();
     p.StartInfo.CreateNoWindow = true;
     p.StartInfo.UseShellExecute = false;
     p.StartInfo.RedirectStandardOutput = true;
     p.StartInfo.FileName = "ipconfig";
     p.StartInfo.Arguments = "/all";
     p.Start();
     p.WaitForExit();
     string s = p.StandardOutput.ReadToEnd();
     string temp = s.Substring(s.IndexOf("Physical Address. . . . . . . . . :") + 36, 17);
     //MessageBox.Show(s.Substring(s.IndexOf("Physical Address. . . . . . . . . :") + 36, 17));
     Label1.Text = temp;