GitHub Actions is a powerful tool for automating workflows and building custom software development tools. We use them a lot on the .NET team at Microsoft, including validation and automation for pull requests on the .NET blog. In this presentation, we will explore how to write a useful GitHub Action using .NET, Copilot and the brand new Octokit SDK (built with Kiota). We'll live code an action, using Copilot to get around some of the quirks of both GitHub Actions and Octokit. I'll share some lessons I learned the hard way and show you how you can start automating your pull request workflow with C# code.