判断Windows服务是否已经启动

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceProcess;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            ServiceIsExisted("MSSQLSERVER");
        }
        private static bool ServiceIsExisted(string serviceName)
        {
            ServiceController[] services = ServiceController.GetServices();
            foreach (ServiceController s in services)
            {
                if (s.ServiceName == serviceName && s.Status == ServiceControllerStatus.Stopped)
                {
                    s.Start(); return true;
                }
            }
            return false;
        }
    }
}