Programming in C# (55339AC) — Lesson 3: Collections, LINQ, Events, and Asynchronous Code

Learning Objectives

• Use generic collections, dictionaries, sets, and custom types
• Query and transform data with LINQ
• Apply delegates, events, lambda expressions, tasks, and async/await

Detailed Topics

• Use generic collections: Use generic collections, dictionaries, sets, and custom types
• Query and transform data with LINQ: Query and transform data with LINQ
• Apply delegates: Apply delegates, events, lambda expressions, tasks, and async/await

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

Create an asynchronous data-processing component using LINQ.

• 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 Collections, LINQ, Events, and Asynchronous Code in a realistic scenario and validate the result with documented evidence.