Free csharp Courses

Microsoft Learn's official C# learning path. Covers syntax, variables, methods, classes, collections, LINQ, and async programming through interactive browser-based exercises. Free and earns a Microsoft achievement on completion.

freeCodeCamp's complete C# course with Mike Dane. Covers the core concepts of C# — syntax, OOP, collections, exceptions, file I/O, and LINQ. A solid on-ramp to C# and the .NET ecosystem. Free on YouTube.

Microsoft Learn's end-to-end .NET path. Covers building console apps, web APIs with ASP.NET Core, working with Entity Framework, and deploying to Azure. Interactive exercises throughout. Free with a Microsoft achievement.