Programming in C# (55339AC) — Lesson 2: Object-Oriented Design and Reusable Components

Learning Objectives

• Create classes, fields, properties, methods, constructors, and encapsulation
• Use inheritance, polymorphism, abstract classes, and interfaces
• Organize code with namespaces, assemblies, access modifiers, and design principles

Detailed Topics

• Create classes: Create classes, fields, properties, methods, constructors, and encapsulation
• Use inheritance: Use inheritance, polymorphism, abstract classes, and interfaces
• Organize code with namespaces: Organize code with namespaces, assemblies, access modifiers, and design principles

Guided Demonstration

1. Review the requirement, environment, dependencies, roles, risks, and expected outcome.
2. Demonstrate the relevant configuration, analysis, code, or administration workflow step by step.
3. Capture settings, outputs, logs, screenshots, calculations, or test evidence.
4. Compare the observed result with the stated acceptance criteria.

Hands-On Activity

Design and implement an object-oriented business domain model.

• Document assumptions and the planned sequence before making changes.
• Complete the activity and preserve evidence of normal and exception behavior.
• Record issues, corrective actions, and reusable operational or development notes.

Troubleshooting Focus

• Separate symptoms from causes and collect evidence before applying a fix.
• Check configuration, permissions, data, dependencies, capacity, connectivity, and recent changes.
• Validate rollback, recovery, support ownership, and user or business impact.

Validation Checklist

• The requirement and expected outcome are clear.
• The selected configuration, design, query, code, or process is documented.
• Normal, boundary, failure, security, and operational conditions are reviewed.
• The result is supported by evidence and the next improvement is prioritized.

Lesson Outcome

Learners can explain and apply Object-Oriented Design and Reusable Components in a realistic scenario and validate the result with documented evidence.