Demonstrates how to detect end of a running process

ProcessEnd.cs

// purpose: detect process end
// demo:
// - launch firefox
// - launch this program
// - close firefox and see 'died'
// notes:
// - may need sudo on *nix systems

using System;
using System.Diagnostics;
using System.Linq;

class Program
{
    static Process _process;
    static void Main(string[] args)
    {
        var allProcesses = Process.GetProcesses();
        _process = allProcesses.Where(x => x.ProcessName.Contains("firefox")).First();
        _process.EnableRaisingEvents = true;
        _process.Exited += new EventHandler(OnExit);

        Console.WriteLine("Hit a key to exit");
        Console.ReadLine();
    }
    static void OnExit(object sender, System.EventArgs e)
    {
        Console.WriteLine("died");
    }
}