Why FileSystemWatcher doesn't work in Linux container watching Windows volume

Question

Given the program:

using System;
using System.IO;

namespace fsw_bug_poc
{
    class Program
    {
        private static          


        

Answer 1

Switching to PhysicalFileProvider.Watch did the job. It seems to be a more portable implementation for file system watching strategies.

The current implementation of PhysicalFileProvider supports the DOTNET_USE_POLLING_FILE_WATCHER environment variable. I couldn't find any reference of it in FileSystemWatcher implementation.

using System;
using System.IO;

namespace fsw_bug_poc
{
    class Program
    {
        private static PhysicalFileProvider _fileProvider;

        static void Main(string[] args)
        {
            _fileProvider = new PhysicalFileProvider(Path.Combine(Directory.GetCurrentDirectory(), "Watched"));
            WatchForFileChanges();
            
            Console.ReadKey(false);
        }           

        private void WatchForFileChanges()
        {
            _fileChangeToken = _fileProvider.Watch("*.*");
            _fileChangeToken.RegisterChangeCallback(Notify, default);
        }

        private void Notify(object state)
        {
            Console.WriteLine("File change detected");
            WatchForFileChanges();
        }
    }
}