How to set filter for FileSystemWatcher for multiple file types?

Question

Everywhere I find these two lines of code used to set filter for file system watcher in samples provided..

FileSystemWatcher watcher = new FileSystemWatcher(         


        

Answer 1

Since .Net Core 3.x and .Net 5 Preview you can simply add multiple filters to the Filters collection.

var watcher = new FileSystemWatcher();
watcher.Path = "/your/path";
watcher.Filters.Add("*.yml");
watcher.Filters.Add("*.yaml");
watcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName;
watcher.EnableRaisingEvents = true;

Alternatively if you like object initializers,

var watcher = new FileSystemWatcher
    {
        Path = "/your/path",
        Filters = {"*.yml", "*.yaml"},
        NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName,
        EnableRaisingEvents = true,
    };