Windows Service test sample

gistfile1.cs

using System;
using System.ServiceProcess;
using System.Threading;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var service = new ServiceController("msiserver");
            if (service.CanStop)
            {
                Console.WriteLine("idle");
            }
            else
            {
                Console.WriteLine("busy");
            }

            try
            {
                Mutex.OpenExisting("Global\\_MSIExecute");
                Console.WriteLine("busy");
            }
            catch (WaitHandleCannotBeOpenedException)
            {
                Console.WriteLine("idle");
            }
        }
    }
}