In this tutorial, we built a simple .NET Core application that uses the OpenAI API to demonstrate the Retriever- Augmented Generation (RAG) pattern. We used semantic search to retrieve relevant pieces of text from a podcast transcript and then used a language model to generate answers based on those retrieved pieces of text. The code in this tutorial is for demonstration purposes only and should not be used as-is in production applications. Always ensure that your application complies with the terms of service of any third-party services it uses, including OpenAI's API.