启动和停止服务

在进行这些更改之前,如何以编程方式停止服务,然后重新启动它?

namespace ServiceAccount
{
    class Program
    {
        static void Main(string[] args)
        {
            string serviceName = "DummyService";
            string username = ".\\Service_Test";
            string password = "Password1";

            string objPath = string.Format("Win32_Service.Name='{0}'", serviceName);
            using (ManagementObject service = new ManagementObject(new ManagementPath(objPath)))
            {
                object[] wmiParams = new object[11];
                wmiParams[6] = username;
                wmiParams[7] = password;
                service.InvokeMethod("Change", wmiParams);
            }

        }
    }
}