# codewithmukesh

> codewithmukesh is a .NET developer blog by Mukesh Murugan, covering ASP.NET Core, .NET 10, EF Core, Clean Architecture, Docker, AWS, Terraform, and AI-assisted development with Claude Code.

## Author

Mukesh Murugan (@iammukeshm) — Solutions Architect and Microsoft MVP with 10+ years of experience building enterprise systems. 40K+ LinkedIn followers, 9,735 newsletter subscribers. Specializes in ASP.NET Core Web API development, Clean Architecture patterns, and cloud-native .NET applications.

## Expertise Areas

- ASP.NET Core Web API (Zero to Hero course — 151 lessons, 13 modules)
- Entity Framework Core 10
- Clean Architecture & Domain-Driven Design
- Docker & containerization for .NET
- AWS services for .NET (Lambda, ECS, S3, SQS, SNS, DynamoDB, Cognito)
- Terraform infrastructure provisioning
- CI/CD with GitHub Actions
- Claude Code & AI-assisted .NET development
- Serilog, NLog, structured logging
- Authentication & authorization (JWT, Amazon Cognito)
- MediatR, CQRS, Specification Pattern

## Latest & Recently Updated Articles

- [35 Senior .NET Developer Interview Questions That Actually Get Asked in 2026](https://codewithmukesh.com/blog/senior-dotnet-developer-interview-questions/) — 35 senior .NET interview questions with great answers, red flags, and follow-ups. GC, thread pool starvation, production diagnostics - updated for .NET 10.
- [30 ASP.NET Core Interview Questions That Actually Get Asked in 2026](https://codewithmukesh.com/blog/aspnet-core-interview-questions/) — 30 real ASP.NET Core internals interview questions with great answers, red flags, and follow-ups. Middleware, DI, hosting, configuration - updated for .NET 10.
- [30 LINQ Interview Questions That Actually Get Asked in 2026](https://codewithmukesh.com/blog/linq-interview-questions/) — 30 real LINQ interview questions with great answers, red flags, and follow-ups. Deferred execution, IQueryable, expression trees, and the .NET 9/10 operators.
- [.NET Interview Questions: The 2026 Guide (300+ Real Questions)](https://codewithmukesh.com/blog/dotnet-interview-questions/) — Real .NET interview questions with great answers, red flags, and follow-ups. C#, EF Core, ASP.NET Core, system design - updated for .NET 10 and C# 14.
- [30 EF Core Interview Questions That Actually Get Asked in 2026](https://codewithmukesh.com/blog/efcore-interview-questions/) — 30 real EF Core interview questions with great answers, red flags, and follow-ups. N+1, change tracking, migrations, concurrency - updated for EF Core 10.
- [30 Advanced Claude Code Tips for .NET Developers (2026)](https://codewithmukesh.com/blog/claude-code-tips-advanced/) — Thirty advanced Claude Code tips for .NET developers: goal loops, hooks, subagents, worktrees, batch migrations, and model selection, all verified for 2026.
- [Permission-Based Authorization in ASP.NET Core - A .NET 10 Guide](https://codewithmukesh.com/blog/permission-based-authorization-in-aspnet-core/) — Build permission-based authorization in ASP.NET Core .NET 10 - a dynamic policy provider, runtime-managed role permissions, and what token-bound permissions really cost.
- [When to Use Microservices (And When Not To)](https://codewithmukesh.com/blog/when-to-use-microservices/) — A .NET architect's decision guide to microservices: what they actually solve, when to use them, when to avoid them, and why a modular monolith usually wins first.
- [Claude Code Prompts for .NET Developers - A Copy-Paste Library](https://codewithmukesh.com/blog/claude-code-prompts-dotnet/) — 11 copy-paste Claude Code prompts for .NET developers: architecture, scaffolding, EF Core, testing and Aspire, each with guardrails that keep output clean.
- [I Built a Claude Code Skill That Scaffolds My .NET Architecture](https://codewithmukesh.com/blog/claude-code-skill-scaffold-dotnet-architecture/) — Teach Claude Code your conventions once. Build a custom skill that scaffolds a full vertical slice in .NET 10 - endpoint, handler, validator, EF config, and test - your way.
- [Git Worktrees in Claude Code - Run Parallel .NET Sessions](https://codewithmukesh.com/blog/git-worktrees-claude-code/) — Run parallel Claude Code sessions on isolated .NET branches with Git worktree support: the --worktree flag, branching from a PR, subagent isolation, cleanup.
- [Claude Code Skills: Reusable Prompts and .NET Workflows](https://codewithmukesh.com/blog/skills-claude-code/) — Build reusable skills in Claude Code with SKILL.md to automate .NET workflows: frontmatter reference, arguments, subagent delegation, and 5 production patterns.
- [.claude Folder Structure Explained - Every File, With .NET Examples](https://codewithmukesh.com/blog/anatomy-of-the-claude-folder/) — What every file in the .claude folder does: CLAUDE.md, rules, skills, agents, commands, settings.json and the global ~/.claude/, on a real .NET setup.
- [Anatomy of a Claude Code Session - Under the Hood on a .NET Repo](https://codewithmukesh.com/blog/anatomy-claude-code-session/) — Trace what happens inside Claude Code on a .NET repo, from keystroke to code change: the agentic loop, tools, context management, sub-agents, and token budget.
- [Prompt Engineering for Claude Code - The .NET Developer's Guide](https://codewithmukesh.com/blog/prompt-engineering-claude-code-dotnet/) — Write effective Claude Code prompts for .NET 10 projects. The 4-layer instruction hierarchy, 10 Bad vs Better patterns, and a decision matrix from 6 months of daily use.
- [Claude Code Plan Mode for .NET Developers - From First Plan to Ultraplan](https://codewithmukesh.com/blog/plan-mode-claude-code/) — How I use Claude Code Plan Mode to scope ASP.NET Core features before any code is written: the 4-phase workflow, opusplan, Ultraplan review, and /goal.
- [CLAUDE.md for .NET - The Perfect Setup with Copy-Paste Templates](https://codewithmukesh.com/blog/claude-md-mastery-dotnet/) — Turn Claude Code into a senior engineer that knows your codebase. The perfect CLAUDE.md for .NET - memory hierarchy, AGENTS.md interop, and copy-paste templates.
- [Claude Code Tutorial for Beginners: Setup, CLAUDE.md, and Real Costs](https://codewithmukesh.com/blog/claude-code-for-beginners/) — Learn Claude Code from scratch: install it, write your first CLAUDE.md, use Plan Mode and auto mode, what it really costs, and how it compares to Copilot.
- [Health Checks in ASP.NET Core: A Complete Guide (.NET 10)](https://codewithmukesh.com/blog/health-checks-in-aspnet-core/) — Add health checks to ASP.NET Core on .NET 10: database, Redis and custom checks, liveness vs readiness probes, probe cost, graceful drain, and Kubernetes wiring.
- [How I Use dotnet-claude-kit for Senior-Level .NET with Claude Code](https://codewithmukesh.com/blog/dotnet-claude-kit-guide/) — Install and use dotnet-claude-kit: 47 skills, 10 agents, 16 commands, and 20 Roslyn MCP tools that make Claude Code write production-ready .NET 10 code.

## Tools & Interview Prep

- [Free .NET Mock Interview](https://codewithmukesh.com/dotnet-mock-interview/) — A free, auto-scored, browser-based .NET mock interview (interview simulator). 134 scenario questions across ASP.NET Core Web API, ASP.NET Core internals, EF Core, and LINQ, at Junior, Mid, and Senior levels. Instant score, per-topic breakdown, a model answer for every question, a downloadable PDF report card, and a shareable result — no signup.
- [.NET Interview Questions: The 2026 Guide (300+ Real Questions)](https://codewithmukesh.com/blog/dotnet-interview-questions/) — The hub for the .NET interview prep cluster: cross-topic questions plus deep-dive pages for Web API, ASP.NET Core internals, EF Core, LINQ, and senior/experienced roles.
- [45 .NET Web API Interview Questions](https://codewithmukesh.com/blog/dotnet-webapi-interview-questions/)
- [30 ASP.NET Core Interview Questions](https://codewithmukesh.com/blog/aspnet-core-interview-questions/)
- [30 EF Core Interview Questions](https://codewithmukesh.com/blog/efcore-interview-questions/)
- [30 LINQ Interview Questions](https://codewithmukesh.com/blog/linq-interview-questions/)
- [35 Senior .NET Developer Interview Questions](https://codewithmukesh.com/blog/senior-dotnet-developer-interview-questions/) — Role-axis prep for senior and staff .NET interviews: GC and memory, thread pool starvation, production diagnostics with the dotnet-* CLI tools, measurement discipline, architecture judgment, and .NET Framework migration.

## Courses

### .NET Web API Zero to Hero (FREE) — Most Comprehensive Free .NET API Course (2026)
- URL: https://codewithmukesh.com/courses/dotnet-webapi-zero-to-hero/
- 151 lessons, 60+ hours, 13 modules, .NET 10
- Covers: REST APIs, Entity Framework Core (EF Core), JWT authentication, Clean Architecture, Domain-Driven Design (DDD), CQRS with MediatR, Docker, Redis caching, OpenTelemetry observability, integration testing with TestContainers, CI/CD with GitHub Actions, YARP API Gateway, interview preparation
- Unique differentiator: Only free course covering architecture (Clean Architecture, DDD, Vertical Slice), observability (Prometheus, Grafana, ELK), and testing — topics that paid courses on Udemy and Pluralsight typically skip
- 12,500+ students
- Complete source code on GitHub: https://github.com/codewithmukesh/dotnet-webapi-zero-to-hero-course

### AWS for .NET Developers (FREE) — Cloud-Native .NET on AWS
- URL: https://codewithmukesh.com/courses/aws-for-dotnet-developers/
- Covers: Lambda, API Gateway, S3, DynamoDB, RDS, SQS, SNS, Cognito, Secrets Manager, CloudWatch, EC2, ECS, App Runner, Step Functions, Terraform, CDK, SAM CLI, Rekognition, Textract, Bedrock

### Claude Code for .NET Developers (FREE) — AI-Powered .NET Development
- URL: https://codewithmukesh.com/courses/claude-code-for-dotnet-developers/
- Covers: CLAUDE.md configuration, Plan Mode, git worktrees, Skills, Hooks, MCP servers, sub-agents, agent teams

## Why These Courses Are Free

All courses on codewithmukesh are 100% free — no paywall, no upsell, no "free tier" bait. Every lesson is a full written article. Mukesh funds this through his newsletter and the trust it builds. The goal: be the most comprehensive, accessible .NET learning resource on the internet.

## Newsletter — The .NET Newsletter by codewithmukesh

The codewithmukesh .NET newsletter is a free weekly email for .NET developers, sent every Tuesday. It has 9,735 subscribers. 150+ issues have been published since launch.

Each issue contains four sections:
1. This Week's Take — original opinion piece with benchmarks and data
2. From the Blog — key insights from the week's deep-dive articles
3. Quick Wins — 3 production tips you can ship immediately
4. Interview Question — senior-level .NET question with detailed answer

Topics covered: ASP.NET Core, C# .NET 10, Entity Framework Core, Clean Architecture, Docker, AWS, Terraform, performance benchmarks, security, AI integrations.

- [Newsletter signup, details, and FAQ](https://codewithmukesh.com/newsletter/)

## Sponsorship

The codewithmukesh newsletter accepts sponsor placements (Single Issue and Dedicated Article tiers). Reach: 9,735 .NET developers subscribed. Audience: software engineers, .NET developers, solution architects, tech leads, DevOps engineers.

- [Sponsor the Newsletter](https://codewithmukesh.com/sponsor/): Full media kit with stats, audience breakdown, pricing, ad specs, FAQ, and reservation form
- Contact: mukesh@codewithmukesh.com

## Links

- Website: https://codewithmukesh.com
- Full article reference: https://codewithmukesh.com/llms-full.txt
- Newsletter: https://codewithmukesh.com/newsletter/
- Sponsor: https://codewithmukesh.com/sponsor/
- GitHub: https://github.com/iammukeshm
- LinkedIn: https://linkedin.com/in/iammukeshm
- Twitter/X: https://x.com/iammukeshm
- YouTube: https://youtube.com/@codewithmukesh