CSharp-Coder

Learn how to use Docker with .NET 9 to containerize and deploy your ASP.NET Core app. Step-by-step tutorial with Dockerfile examples. Start building today! If you're building modern web APIs or web apps, learning how to use Docker with .NET 9 is one of the highest-leverage skills you can pick up in 2026. Containers let you package your ASP.NET Core application — code, runtime, and dependencies — into a single portable image that runs identically on your laptop, your teammate's machine, and production in the cloud. In this tutorial, you'll learn how to containerize an ASP.NET Core app from scratch, write an optimized Dockerfile, use Docker Compose for multi-container setups, and deploy with confidence. By the end, you'll understand not just how to dockerize ASP.NET Core, but why each step matters — including the performance and security trade-offs that separate a beginner image from a production-ready one. Why Use Docker with .NET 9? The phrase "it ...