PoeProcessHandler.cs

using System.Diagnostics;

namespace AutoQuit
{
    class PoeProcessHandler
    {
        public static int ExitPoe(string ExeName, string arguments)
        {
            // Prepare the process to run
            ProcessStartInfo start = new ProcessStartInfo();
            // Enter in the command line arguments, everything you would enter after the executable name itself
            start.Arguments = arguments;
            // Enter the executable to run, including the complete path
            start.FileName = ExeName;
            // Do you want to show a console window?
            start.WindowStyle = ProcessWindowStyle.Hidden;
            start.CreateNoWindow = true;
            int exitCode;


            // Run the external process & wait for it to finish
            using (Process proc = Process.Start(start))
            {
                proc.WaitForExit();

                // Retrieve the app's exit code
                exitCode = proc.ExitCode;
            }
            return exitCode;
        }
    }
}