Microsoft launches Custom Agents for .NET — meet C# Expert and WinForms Expert

Copilot now supports purpose-built “custom agents” for the .NET ecosystem, with the debut of two specially trained offerings: C# Expert and WinForms Expert. These agents are designed to deeply accelerate developer workflows by analysing codebases, planning tasks and executing commands with domain-specific expertise.

Introducing two experimental agents for .NET developers:

• C# Expert Agent

  Get best practices and guidance for C# development. This agent focuses on Core C# principles, code integrity, and testing standards—helping you write cleaner, more efficient code.

• WinForms Expert Agent

  Perfect for developers working on Windows Forms applications, this agent specializes in UI design patterns, event-driven programming, and tool integrity—ensuring your app stays stable and designer-friendly.

• How to get started

  Download CSharpExpert.agent.md and WinFormsExpert.agent.md from @github/awesome-copilot, and add them to your repo’s .github/agents folder.

• Assign with ease

  When assigning an issue to Copilot, simply tag C# Expert or WinForms Expert for tailored support.

• What’s improved

  Enjoy a smoother development experience with reduced unused code and built-in safeguards to protect your project files and maintain tool compatibility.

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