LINQ Methods You're Probably Not Using (Hidden Gems)

September 26, 2025
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Video Description

Stop writing 10-line loops when one LINQ method will do! In this presentation, I cover the game-changing LINQ methods that shipped with .NET 6+ that most developers don't know about.

This presentation is based on my VSLive column article: LINQ Methods You're Not Using (But Should Be)

What you'll learn: ✔ Chunk() - Process collections in batches without Skip/Take inefficiency ✔ DistinctBy() & UnionBy() - Finally, no more GroupBy workarounds! ✔ MinBy() & MaxBy() - Stop sorting entire collections for one item ✔ ExceptBy() & IntersectBy() - Set operations without intermediate collections ✔ TryGetNonEnumeratedCount() - Avoid accidental enumeration ✔ Zip() - Combine parallel collections elegantly

The presentation starts with a refresher on Big O notation (perfect if you have a music degree like me!) explaining why O(n) vs O(n²) matters in real code. Then we dive into practical examples showing how these methods can make your code both cleaner AND faster.

Real-world examples include: • Batch processing for API rate limits • Finding inactive customers • Combining data from multiple sources • Processing large datasets efficiently

Perfect for intermediate to advanced C# developers who want to level up their LINQ game. All methods shown require .NET 6 or later.

#dotnet #csharp #linq #dotnet6 #programming #cleancode #performance

Source Code & Resources

Get the Code: LINQ Methods Code

Read the Full Article

This presentation is based on my VSLive column where I talk a little more about each method with additional examples.

Read the article: LINQ Methods You're Not Using (But Should Be) on VSLive

Key Takeaways

  1. Stop sorting for single items - Replace every OrderBy().First() with MinBy() or MaxBy()
  2. Chunk for batch processing - More efficient than Skip/Take and clearer intent
  3. DistinctBy eliminates boilerplate - No more custom equality comparers
  4. Performance matters - Understanding O(n) vs O(n²) can save your app from timeouts

Video Info

  • Duration: 11 mins
  • Published: January 22, 2025
Categories: dotnet