Learn C#

C# is a modern, object-oriented language developed by Microsoft. It is commonly used for building Windows desktop applications, games with the Unity engine, and backend services on the .NET platform. It suits beginners who want one language that scales from small console programs to large production systems.

What this path covers

25 chapters, in reading order: values and syntax, control flow, functions, collections, objects, error handling, and a small combined project, followed by intermediate topics (debugging, files, APIs, async, project structure, state) and advanced topics (architecture, testing, security, performance, deployment, and a full real-project walkthrough).

Start here

C# foundations — The mental model for reading a program: values, statements, output, and program flow.

Full chapter list

1. C# foundationsBeginner
2. C# syntax and data typesBeginner
3. C# variables and valuesBeginner
4. C# operators and expressionsBeginner
5. C# conditions and decisionsBeginner
6. C# loops and repetitionBeginner
7. C# functions and reusable logicBeginner
8. C# arrays, lists, maps, and setsBeginner
9. C# objects and classesBeginner
10. C# error handling and debuggingBeginner
11. C# basic projectBeginner
12. C# debugging step by stepIntermediate
13. C# files, JSON, and local dataIntermediate
14. C# APIs and HTTPIntermediate
15. C# async programmingIntermediate
16. C# project structure and modulesIntermediate
17. C# state managementIntermediate
18. C# best practices and clean codeIntermediate
19. C# software architectureAdvanced
20. C# testing behaviorAdvanced
21. C# security foundationsAdvanced
22. C# performance and measurementAdvanced
23. C# deployment and releaseAdvanced
24. C# real project walkthroughAdvanced
25. C# real-world patterns and advanced conceptsAdvanced