using NLog;
using NLog.Targets;
using NLog.Targets.Wrappers;
using System.Threading;

class Example
{
    static void Main(string[] args)
    {
        FileTarget target = new FileTarget();
        target.Layout = "${longdate} ${logger} ${message}";
        target.FileName = "${basedir}/logs/logfile.txt";
        target.ArchiveFileName = "${basedir}/archives/log.{#####}.txt";
        target.ArchiveEvery = FileTarget.ArchiveEveryMode.Minute;
        target.ArchiveNumbering = FileTarget.ArchiveNumberingMode.Rolling;
        target.MaxArchiveFiles = 3;

        // this speeds up things when no other processes are writing to the file
        target.ConcurrentWrites = true;

        NLog.Config.SimpleConfigurator.ConfigureForTargetLogging(target, LogLevel.Debug);

        Logger logger = LogManager.GetLogger("Example");

        // generate a large number of messages, sleeping 1 second between writes
        // to observe time-based archiving which occurs every minute

        //
        // you get:
        //      logs/logfile.txt
        //
        // and your archives go to:
        //
        //      archives/log.00000.txt
        //      archives/log.00001.txt
        //      archives/log.00002.txt
        //      archives/log.00003.txt
        //      archives/log.00004.txt

        for (int i = 0; i < 250; ++i)
        {
            logger.Debug("log message {i}", i);
            Thread.Sleep(1000);
        }
    }
}