TestTimeout.cs

class TestTimeout
{
    static void Main(string[] args)
    {
        new Timeout(
            start: () =>
            {
                Thread.Sleep(10000);
                Console.WriteLine("it's working!");
            },
            timeouted: () => Console.WriteLine("timed out!"),
            milisecond: 1000).Run();
    }

    class Timeout
    {
        ThreadStart start;
        Action timeouted;
        int milisecond;

        public Timeout(ThreadStart start, Action timeouted, int milisecond)
        {
            this.start = start;
            this.timeouted = timeouted;
            this.milisecond = milisecond;
        }

        public void Run () {
            Thread thread = new Thread(start);

            thread.Start();

            if (!thread.Join(this.milisecond))
            {
                timeouted();
            }
        }
    }
}