Design Patterns: Let's talk about Observer Pattern in C#!

The Observer Pattern is a great solution for creating systems where multiple objects need to be notified of changes in another object, all while keeping the code decoupled and organized. It’s commonly used in event systems, notifications, and even graphical interfaces.

📌 What is the Observer Pattern?

The Observer Pattern establishes a relationship between a subject (the observed object) and observers (objects that react to changes). When the subject's state changes, it notifies the observers.

🎯 When to Use It?

• Notification systems (e.g., state change alerts).
• Handling events in graphical interfaces.
• When multiple components rely on a single state.

🔧 Implementing in C#

1️⃣ Define the Interfaces

Start by defining the interfaces for managing communication

2️⃣ Implement the Subject

Now, create a concrete class to manage the observers and state:

3️⃣ Implement the Observers

Create classes that will react to changes in the subject:

4️⃣ Example Usage

Now, let’s connect the WeatherStation and the observers:

📚 Benefits of the Observer Pattern

✅ Decouples classes.

✅ Easier to add new observers.

✅ Promotes code reuse and organization.

⚠️ Considerations

• Can become complex with many observers.
• Avoid notification loops.

💬 Have you implemented the Observer Pattern in your projects? Share your experience in the comments! 🚀

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