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Book Overview & Buying
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Table Of Contents
Apps and Services with .NET 10 - Third Edition
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Integrating a large language model (LLM) like OpenAI’s GPT-5.2 into a .NET project can significantly enhance its capabilities, offering advanced natural language processing, content generation, and more.
This chapter is about building an LLM-based chat service that will fine-tune a standard model with custom information, including PDF and Markdown files, a biography of this book’s author, and information from the Northwind database. This allows the user to ask questions about the author and a fictional corporation’s database.
You will also learn how to build a Model Context Protocol (MCP) server which is the latest standard way to extend the capabilities of an AI agent. Finally, you will learn how to use local models for no-cost intelligence.
At the time of writing, cloud-based LLM APIs cost money. In this chapter, we will use one of the least expensive options: OpenAI’s GPT-5 nano. As OpenAI says, ...