Techno Webdev

C# and .NET Development · Async-first with weekly live Q&A

LINQ, Collections, and Data-Oriented C#

Move from foreach-heavy code to expressive pipelines without sacrificing clarity. You will benchmark hot paths, choose appropriate collection types, and structure queries that remain legible for teammates who switch between Japanese and English identifiers daily.

JPY 62,000 — informational only

4 weeks · 48 hours · Intermediate · Language: English · Certificate included

Visual treatment for LINQ, Collections, and Data-Oriented C#

What ships in the syllabus

  • Profiling small benchmarks with BenchmarkDotNet snippets
  • Span and Memory introductions where they matter
  • EF-free querying exercises on in-memory graphs
  • Functional-style folds with explicit mutability boundaries
  • Code smells checklist for LINQ-heavy services
  • Readable projection patterns for reporting layers

Outcomes we assess

  1. Refactor a reporting query to cut allocations measurably
  2. Pick collection types for bounded queues vs growable lists
  3. Author a short design note explaining pipeline trade-offs

Lead mentor

Avatar for Amelia Chen

Amelia Chen

Data platform lead; teaches query clarity for mixed-experience squads.

Participant voices

Benchmark week embarrassed my old foreach chain in a good way. Mentor comments were blunt and useful.

— Kenji · Google

The projection patterns section is now our team cheat sheet for monthly KPI exports.

— Priya · Backend developer · Nagoya logistics · 4/5

Client in manufacturing — appreciated the emphasis on readable pipelines over clever tricks.

— Anonymous learner

FAQ for this track

Primarily in-memory and IEnumerable scenarios. EF Core specifics appear in the dedicated EF course.