使用 ASP.NET Core 和 OpenAI 构建 AI 驱动的 API（.NET 8 指南）

AI features are becoming a standard part of backend development. In the past, most APIs were simple CRUD endpoints focused on data retrieval and updates, returning JSON. Nowadays, requests often involve AI capabilities, such as adding chatbot endpoints, summarizing user feedback, and automatically classifying support tickets. This shift necessitates backend systems to interact with AI models. For developers familiar with ASP.NET Core, the initial approach is typically to call the OpenAI API directly from an endpoint and return the results. While this works for quick prototypes, it raises questions as the system scales, such as where the AI logic should reside and whether controllers should directly invoke AI models.