# ASP.NET Core

This week: two bool.dev guides on hidden EF Core costs and consolidating microservices without losing module boundaries; Booking.com’s production investigation into Node.js resource efficiency; and LinkedIn’s move to a dedicated shuffle service for Spark and Flink.

EF Core makes the slow path look exactly like the fast path. A scan, an N+1 loop, and a Cartesian join all read like clean LINQ. This guide walks through 18 concrete mistakes across querying, related data, change tracking, indexes, plan caching, and context overhead, with the fix for each and a ready-to-use rule for your AI coding assistant.

Prepare for your next .NET interview with 800+ interview questions and answers covering C#, ASP.NET Core, SQL, NoSQL, microservices, distributed systems, testing, AI, Agile, desktop and mobile development. For developers, senior engineers, architects and tech leads.

In this article, we review AI, LLM, prompting, .NET AI integration, Semantic Kernel, Microsoft Agent Framework, MCP, RAG, resilience, testing, observability, security, and AI coding tools for .NET engineers.

60+ C# / .NET testing interview questions with code examples. Covers unit testing, integration testing, gRPC, contracts, distributed systems, Playwright, and performance.

Learn the most common unit test anti-patterns in .NET, over-mocking, testing implementation details, flaky async, assertion roulette, and how to fix them.

In this article, we explore microservices and distributed systems interview questions and answers, and what every .NET engineer should know, from service boundaries and BFF to sagas, events, service discovery, and communication patterns.

This chapter explores NoSQL Databases questions that  .NET engineers should be able to answer in an interview.

This chapter explores SQL Database questions that  .NET engineers should be able to answer in an interview.

Overview of the Microsoft Orleans framework: virtual actors, grains, runtime, and use cases. Build scalable, fault-tolerant distributed systems in  .NET.

Master ASP.NET Core for interviews! Explore middleware, routing, DI, caching, & security with expert Q&A for junior to senior .NET devs.

This chapter explores design patterns, anti-patterns, and principles that are usually used across development on .NET. 

This chapter explores advanced asynchronous and parallel programming in .NET, including Tasks, Thread Pools, channels, race conditions, context switches, and best practices.

This Chapter covers data structures in .NET, collections and their implementations, and performance characteristics.

Weekend Reading: A weekly roundup of interesting Software Architecture and Programming articles from tech companies. Find fresh ideas and insights every weekend.

This article explores essential C# type concepts, providing detailed explanations, code examples, and junior, middle, and senior expectations to enhance your understanding and boost your confidence.

Weekend Reading: A weekly roundup of interesting Software Architecture and Programming articles from tech companies. Find fresh ideas and insights every weekend.

Learn how to utilize ChatGPT to generate and customize various architecture diagrams in Draw.io. Enhance your workflow efficiency by automating diagram creation with AI.

In this article we look at the advantages and disadvantages of Vertical Slice Architecture for .NET application development

In this article, we have collected the best Nuget packages for .NET development, which will be useful for you in your daily development activities