/// <summary>
/// 远程关闭计算机或重启计算机
/// </summary>
/// <param name="str">命令</param>
/// <param name="ip">ip地址</param>
static void Invoke(string str, string ip)
{
 //定义连接远程计算机的一些选项
 ConnectionOptions options = new ConnectionOptions();
 options.Username = "administrator";
 options.Password = "Btmu@123";
 ManagementScope scope = new ManagementScope("\\\\" + ip + "\\root\\cimv2", options);
 try
 {
  //用给定管理者用户名和口令连接远程的计算机
  scope.Connect();
  ObjectQuery oq = new ObjectQuery("select * from win32_OperatingSystem");
  ManagementObjectSearcher query1 = new ManagementObjectSearcher(scope, oq);
  ManagementObjectCollection queryCollection1 = query1.Get();
  foreach (ManagementObject mo in queryCollection1)
  {
   string[] ss = { "" };
   if (str == "重新启动")
   {
    mo.InvokeMethod("Reboot", ss);
   }
   if (str == "关闭计算机")
   {
    mo.InvokeMethod("Shutdown", ss);
   }
  }
 }
 catch (Exception er)
 {
  Console.WriteLine("连接" + ip + "出错，出错信息为：" + er.Message);
 }
}