ServiceController sc = new ServiceController("Service_1");

sc.Refresh();
        try
        {
            if (sc.Status == ServiceControllerStatus.Stopped)
            {
                sc.Start();
            }
            for (int i = 0; i < 100; ++i)
            {
                Thread.Sleep(100);
                sc.Refresh();
                if (sc.Status == ServiceControllerStatus.Running)
                {
                    break;
                }
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }