CSharp-Coder

Learn Docker for .NET developers from scratch: build images, run ASP.NET Core containers, and use docker-compose with SQL Server. Start containerizing today. If you have ever heard "it works on my machine" (or said it yourself), Docker is the fix. This guide to Docker for .NET developers starts from zero: what containers and images actually are, how to write a production-grade Dockerfile for an ASP.NET Core app, and how to wire up docker-compose with SQL Server so your whole stack starts with one command. Every example runs on .NET 8/9 with Windows, macOS, or Linux as the host. Why Docker Matters for .NET Developers Historically, .NET meant IIS on Windows Server. Since .NET Core, the runtime is cross-platform and Microsoft publishes official Linux images on the Microsoft Container Registry (MCR). That changes deployment fundamentally: Reproducibility: the image contains the exact runtime, native libraries, and configuration. Dev, CI, staging, and production run the s...