C# is a statically-typed, object-oriented language designed by Microsoft for the .NET runtime, first released in 2002 and modernized continuously through to C# 13. It started as a Java alternative for Windows desktop apps and grew into a multi-platform language that runs server backends, mobile apps via .NET MAUI, game logic in Unity, and increasingly cloud workloads on Azure and AWS Lambda.
The .NET 8/9 release line consolidated everything onto a single cross-platform runtime. ASP.NET Core handles HTTP services with the same ergonomic minimal-API style as Express or Fastify; Entity Framework Core replaces hand-written SQL for most CRUD; Blazor lets you write interactive web UIs in C# instead of JavaScript.
What you'll work with in these 110 courses
- Modern C# language features: records, pattern matching, primary constructors, required members
- ASP.NET Core: Minimal APIs, MVC, SignalR, gRPC services
- Entity Framework Core: migrations, query optimization, raw SQL fallbacks
- Game development: Unity scripting, Godot via C# bindings
- Cross-platform UI: .NET MAUI, Avalonia, Blazor Server / WASM
- Async patterns:
Task,ValueTask, channels, async streams
Stack Overflow, Microsoft Office 365, GitHub Enterprise, the Bing search backend, Stack Exchange, and most of Unity-built games (Cuphead, Hollow Knight, Pokémon GO) ship C# in production.
