SerilogMultiProcessTest.cs

namespace MultiProcessTest
{
    using System;
    using System.Diagnostics;
    using System.Globalization;
    using System.Linq;
    using Serilog;

    internal class Program
    {
        private static void Main(string[] args)
        {
            if (args.Length == 0)
                RunMain();
            else
                RunChild(Int32.Parse(args[0]));
        }

        private static void RunChild(int i)
        {
            SetupLog();

            foreach (var count in Enumerable.Range(0, 10000))
                Log.Information("This is logger {number}: {count}", i, count);
        }

        private static void SetupLog()
        {
            Log.Logger = new LoggerConfiguration()
                .WriteTo.RollingFile("log.txt")
                .CreateLogger();
        }

        private static void RunMain()
        {
            var file = Process.GetCurrentProcess().MainModule.FileName;

            foreach (var count in Enumerable.Range(0, 5))
                Process.Start(file, count.ToString(CultureInfo.InvariantCulture));
        }
    }
}