In simple English
This is a set of tools for building websites and web services. You write code in the C# language. It runs on Windows, Mac, and Linux. Large companies and solo builders use it to power production systems. It costs nothing to use under the MIT licence.
What it is
ASP.NET Core is the official framework for building web applications with the .NET (a free, cross-platform, and open-source application runtime) platform. It provides modular components with minimal overhead so you can build secure and fast web APIs.
What it is good for
Solo builders who want to create high-performance web backends or REST APIs using C# (a programming language created by Microsoft) and deploy them to any cloud provider.
- Runs on Windows, Mac, and Linux without changes.
- Extremely fast performance for web requests and APIs.
- Backed by Microsoft with massive documentation and community support.
- Requires learning C# and the broader ecosystem.
- The repository contains the framework source code, not a simple starter app for beginners.
- Large codebase with thousands of open issues to sift through.
Writing raw HTTP listeners or older .NET Framework web stacks.
Entity Framework Core for database access.
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dotnet new webapi -s MyApi cd MyApi dotnet run