I delivered my talk on Architecting Zero Downtime Deployments yesterday at VS Live Las Vegas 2023. It went fairly well, even though I ran some incorrect code somewhere. Apologies for that, but glad I could fix things.
The code for the database and the C# app is in this Github repo: https://github.com/way0utwest/ZeroDowntime
The PPT is also in the repo, updated today.
If you find issues, or an improve my C#, please feel free to open an issue or submit a PR.