C# Guide - .NET managed language - C# | Microsoft Learn

C# is a modern object-oriented programming language from Microsoft designed for building applications on the dotNET platform with features supporting component-oriented and concurrent programming. The language has evolved significantly with recent versions adding pattern matching records file-scoped namespaces and async enumerables. dotNET provides a comprehensive platform for building web mobile desktop and cloud applications with excellent tooling in Visual Studio and VS Code. Game developers use Unity with C# for building 2D and 3D games across all major platforms.