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Video Description
Stop writing loops! LINQ lets you filter, sort, and transform data with clean, readable code. This is the moment C# clicks for most developers.
What you'll learn:
- What LINQ is and why it's magical
- Lambda expressions (the 'equals arrow' syntax)
- Where, Select, OrderBy - your core operations
- First, FirstOrDefault, and when to use each
- GroupBy for data aggregation (subject averages, counts)
- Method syntax vs Query syntax (and why method wins)
- Deferred execution and ToList()
- Common gotchas (multiple enumeration, null collections)
- Real-world examples (sales analysis, gradebook stats)
Key insights:
- LINQ replaces loops - describe WHAT you want, not HOW
- Lambda expressions = anonymous functions (way less code!)
- Method syntax is what everyone actually uses
- Deferred execution is a feature, not a bug
- Once you learn LINQ, it works everywhere (DB, XML, JSON)
- GroupBy unlocks powerful data analysis
- Zero temporary variables = fewer bugs
We'll build:
- Student gradebook with filtering and sorting
- Sales analysis with grouping and aggregates
- Real business logic examples
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Chapters
- 0:00 Overview
- 0:35 Life Before LINQ
- 1:27 The LINQ Way
- 2:18 Lambda Expressions: The Arrow Syntax
- 2:36 Lambda vs. Regular Functions
- 3:11 Lambda Expressions: The Arrow Syntax
- 4:03 Common LINQ Methods Reference
- 4:32 Where: Filtering Data
- 5:07 Select: Transforming Data
- 5:43 First and FirstOrDefault
- 6:24 OrderBy: Sorting Made Simple
- 7:09 Query Syntax vs Method Syntax
- 8:04 Deferred Execution
- 8:21 Deferred Execution in Action
- 9:11 GroupBy: The Power Tool
- 10:03 GroupBy with Aggregates
- 10:46 LINQ Gotchas
- 11:49 Real-World Example: Sales Analysis
- 12:14 Key Takeaways
- 13:31 Practice Challenge
Video Info
- Duration: 15:04
- Published: November 20, 2025
