A decade later, Microsoft released Visual Studio Code (code editor), Roslyn (compiler), and the unified. Four years later, in 2004, a free and open-source project called Mono began, providing a cross-platform compiler and runtime environment for the C# programming language. At the time, Microsoft had no open-source products. NET Framework and Visual Studio, both of which were closed-source. The C# programming language was designed by Anders Hejlsberg from Microsoft in 2000 and was later approved as an international standard by Ecma (ECMA-334) in 2002 and ISO/ IEC (ISO/IEC 23270) in 2003. C# encompasses static typing, : 4 strong typing, lexically scoped, imperative, declarative, functional, generic, : 22 object-oriented ( class-based), and component-oriented programming disciplines. NET Framework (discontinued), Mono, DotGNU (discontinued), Universal Windows PlatformĬ++, Cω, Eiffel, F#, Haskell, Scala, Icon, J#, J++, Java, ML, Modula-3, Object Pascal, VBĬhapel, Clojure, Crystal, D, J#, Dart, F#, Hack, Java, Kotlin, Nemerle, Oxygene, Rust, Swift, Vala, TypeScriptĬ# (pronounced See sharp) is a general-purpose high-level programming language supporting multiple paradigms.