Introduction

Happy coding! Today I want to share a practical AI tutorial in .NET style, with real code, simple architecture, and a result you can run on your own machine.

When many developers start building AI knowledge assistants, the first idea is usually RAG . That is a good choice in many cases, but not always the simplest one. Sometimes, your knowledge base is actually small, focused, and stable. In that lovely situation, building a small LLM Wiki can be a more elegant choice.

Let me tell a short lovely story.

Imagine a small tea house run by a kind grandmother. Every morning, her grandchildren ask the same questions:

Which tea is good for a cold day?

Which dessert has nuts?

What is the house special today?

Now imagine two ways to help them.

The first way is to hire a fast librarian who runs to a giant archive room every time a child asks a question. That is a bit like RAG .

The second way is to write one beautiful, well-organized family handbook and keep it on the table all the time.…