如何使用C＃编写的服务程序管理其他系统服务？

Question

如何在C#编写的服务程序中管理（启动、暂停、停止）其他系统服务？这是我写的程序：
 protected override void OnStart(string[] args)
        {
            Thread Th = new Thread(this.Running);
            Th.Start();        }
        private void Running()
        {
           sc=new System.ServiceProcess.ServiceController("W3SVC");
           while (true)
           {
               try
               {
                   TcpClient tc = new TcpClient();
                   tc.Connect("localhost", 80);
                   tc.Close();
                   tc = null;
               }
               catch
               {
                   string scStatus = sc.Status.ToString();
                   switch (scStatus.ToUpper())
                   {
                       case "PAUSED":
                           sc.Continue();
                           break;
                       case "STOPPED":
                           sc.Start(); // VS显示问题出在这里
                           break;
                   }
                   scStatus = null;
               }
              Thread.Sleep(3 * 1000);
           }
        }
当W3SVC服务停止时，VS调试程序却总是提示“无法启动.上的W3SVC服务（大概是这个意思）”