Deisgn Patterns: Let's talk about Memento Pattern in C#!

The Memento Pattern is a behavioral design pattern that allows you to save and restore the state of an object without exposing its implementation details. This is particularly useful for scenarios involving undo/redo functionality, checkpoints, or maintaining history.

📌 What is the Memento Pattern?

The Memento Pattern provides a way to capture an object's internal state and save it externally so that the object can be restored to this state later. It involves three components:

• Originator: The object whose state needs to be saved.

• Memento: Stores the state of the originator.

• Caretaker: Manages the mementos and requests state saving/restoration.

🎯 When to Use It?

• When you need undo/redo functionality.

• To save checkpoints of an object's state.

• To maintain the integrity and encapsulation of the object's data.

🔧 Implementing in C#

1️⃣ Define the Memento Class

Create a class to store the state of the originator:

2️⃣ Implement the Originator

Create a class that generates and restores mementos:

3️⃣ Implement the Caretaker

Create a class to manage the mementos:

4️⃣ Example Usage

Use the memento pattern to save and restore the object's state:

Output:

📚 Benefits of the Memento Pattern

✅ Encapsulation—keeps the object's state private.

✅ Easy to implement undo/redo functionality.

✅ Simplifies saving checkpoints or snapshots of an object's state.

⚠️ Considerations

• Can become memory-intensive if too many mementos are stored.

• Requires careful management of the memento lifecycle.

💬 Have you used the Memento Pattern in your projects? What scenarios did you find most effective? Share your experiences in the comments! 🚀

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