Learn Azure AI Search with C# — index data, run vector and hybrid queries, and add RAG to your .NET app. Start building intelligent search today. If your application's search box still runs a LIKE '%term%' query against SQL Server, your users are quietly suffering. They type "cheap laptop for uni" and get zero results because your catalogue says "affordable notebook for students." Azure AI Search with C# fixes exactly this problem: it combines classic keyword search, vector embeddings, and semantic reranking into a single managed service that you can drive from .NET with a few dozen lines of code. In this tutorial you'll build a working search index from scratch, run keyword, vector, and hybrid queries, and finish with a Retrieval Augmented Generation (RAG) pattern that grounds an LLM in your own data. This guide targets .NET 9 and the Azure.Search.Documents v11 SDK. Every snippet is runnable. We'll explain why each design choice matter...
Learn TDD in C# using xUnit and Moq. Write tests first, code second with step-by-step examples and best practices. Start building better software today. TDD in C#: Why Writing Tests First Changes Everything TDD in C# is a development practice where you write a failing test before writing the production code that makes it pass. It sounds backwards, but test driven development in C# produces cleaner designs, fewer bugs, and code you can refactor with confidence. In this guide, you will learn how to practice TDD using xUnit and Moq รข€” the two most popular testing libraries in the .NET ecosystem. If you have ever spent hours debugging a regression that slipped through manual testing, TDD is the answer. Instead of treating tests as an afterthought, you make them the driving force behind your design decisions. By the end of this article, you will have a complete, working C# TDD example you can apply to your own projects. What Is Test Driven Development in C#? Test driven deve...