Copilot, Cursor, and Custom LLMs: Navigating the New .NET Developer Experience

Copilot, Cursor, and Custom LLMs: Navigating the New .NET Developer Experience

🎙 Isaac Levin 👥 227K 📅 August 13, 2026 ⏱ 48 min 👁 111 📄 expert opinion 🧭 2026-08-13
Available in: English (current) Français

Keywords

AI-assisted developmentCopilotCursorLLM.NET

Summary

Isaac Levin, a Microsoft MVP and .NET developer for 15 years, presents a practical talk on integrating AI tools into the .NET development workflow. He contrasts the hype of AI promising to replace developers with the reality of increased code review and context management. He explains the difference between raw LLMs and harnesses, highlighting how tools like GitHub Copilot and Cursor act as harnesses to manage context and improve output. Levin emphasizes that context is crucial: without it, AI tools produce generic or incorrect code. He introduces a funnel analogy, from using raw LLMs with minimal context to enterprise RAG for high-fidelity code. He also discusses local LLMs like Ollama for handling proprietary code. The talk includes a live demo comparing Copilot and Cursor on a C# codebase, and concludes with practical advice on context engineering and the changing role of developers.

142 words

Critical Evaluation

Value of the Information & Strength of the Argument

The talk provides valuable insights into the practical use of AI tools for .NET developers, based on the speaker’s extensive experience. Levin effectively debunks the hype around AI replacing developers, presenting realistic expectations and highlighting the importance of context. He explains complex concepts like harnesses and context engineering in an accessible manner. The argumentation is solid, supported by references to research studies (though not cited in detail) and personal anecdotes. The live demo adds credibility, showing real-world application. However, the talk lacks rigorous scientific evidence, relying more on anecdotal experience than systematic analysis.

Scientific Rigor, Source Quality, Title Accuracy

The speaker references research studies on developer productivity but does not provide specific citations during the talk, though he mentions a QR code linking to papers. The sources cited in the description are conference websites, not academic references. The title accurately reflects the content, which is a practical comparison of AI tools for .NET development. The talk is well-structured and the speaker is transparent about the fast-changing nature of the tools. No comments were provided for analysis.

185 words

Title / Content Match

The title accurately reflects the content, which compares Copilot and Cursor for .NET development and discusses custom LLMs.

Quality & Reliability

7/10

The talk is based on the speaker's extensive experience as a .NET developer and Microsoft MVP, and references research studies on developer productivity. However, specific citations are not provided in the talk itself, and the claims are largely anecdotal.

Key Moments

Cited Sources

  • NDC Conferences — Conference website where the talk was recorded.
  • NDC Toronto — Specific conference event page.

Concurring Sources

  • GitHub Copilot — Official GitHub Copilot page, aligning with the talk's discussion of the tool.
  • Cursor — Official Cursor website, aligning with the talk's comparison.

Contribution & Novelties

The talk provides a practical, experience-based perspective on integrating AI tools into .NET development, emphasizing the importance of context and the role of harnesses. It offers a clear framework (the funnel analogy) for improving AI output and discusses the use of local LLMs for proprietary code. The live demo adds practical value.

Pour aller plus loin :

105 words

Radar Profile

The radar profile shows high scores in information quantity and quality, reflecting the speaker's experience and practical insights. The technical level is moderate, suitable for a broad developer audience. The overall reliability is good, though the lack of specific citations slightly reduces the score.

Reliability 7/10