👉 In the context of programming, a "watcher" is typically used to represent an object that is notified when its value changes. This can be useful in situations where you want to monitor or observe changes to data or state within an application. For example, if you have a class representing a user's preferences and you want to notify the user when their preference changes, you could define a "watcher" for this object like so: ```csharp public class UserPreferences { private string