While both tools are useful, it may not be obvious for new user to know which one to use when. NET applications: the Memory Usage profiler and. I have included some example files to use for this.Visual Studio provides two great tools for analyzing and diagnosing memory issues in. Now, if you drop some files into the “ files” directory, you should see the results of the events firing off, we see the “created” event firing off and we see the consumer class’s function logging the read off lines from the file. When we run this, the application will create a “ files” directory in the running directory. Then we tell our service injector that when we need an instance of the FileConsumer service, we would do it as a scoped instance. Next, we add our filewatcher service as a singleton using the AddSingleton function. We use our generichost’s ConfigureServices function to setup the injection of the Worker class by using the AddHostedService function. IHost host = Host.CreateDefaultBuilder(args) Next, we have a loop that simply flows until we get a cancellation request, for example, at the console during debug which is done by hitting Ctrl+C command or when this is deployed as a windows service is done by telling the service to STOP. We simply call our FileWatcher service’s “ Start” method. We override the base class’s ExecuteAsync method, which fires off when the host has a worker service declared. First, we inject instances of the logger and of our FileWatcher service. It implements BackgroundService class which has the necessary things we need to have a program fire off and run in the background until getting a signal to stop. The worker class is the class that actually runs in the background. While (!stoppingToken.IsCancellationRequested) Protected override async Task ExecuteAsync(CancellationToken stoppingToken) Public Worker(ILogger logger,IMyFileWatcher watcher) Private readonly IMyFileWatcher _watcher what we want to do when those events occur. what notification events we want to act upon.what properties about those files we are interested in.what type of files we want to look out for.The class implements the FileSystemWatcher component and describes: This is the workhorse of the application. Task.Run(() => consumerService.ConsumeFile(e.FullPath)) Using ( var scope = _serviceProvider.CreateScope()) Private void _fileSystemWatcher_Created( object sender, FileSystemEventArgs e) Private void _fileSystemWatcher_Changed( object sender, FileSystemEventArgs e) _logger.LogInformation($ " Starting read of ") Public async Task ConsumeFile( string pathToFile) Public FileConsumerService(ILogger logger) Public class FileConsumerService : IFileConsumerService We will use the DI chain’s service provider to implement this class with a limited scope. We will do this by having a scoped service class that will act as our file consumer. When a file addition occurs, we will consume the file and read the lines from it.We will create a service class that utilizes the FileSystemWatcher to watch a specified directory for changes.We will create a worker service project using the. NET FileSystemWatcher is a component used to watch a directory for change notifications from the system such as a file being added, updated, or deleted. NET is the project template that is used for long running and resource intensive tasks best regulated to run headless(no UI) and in the background.NET’s implementation of the background service gives use access to cross platform targeting and also since it uses the generic host mechanism, it gives us access to commonly used things like the dependency injection chain, logging, and configuration that we may already be used to.
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