The C# programming language can be used to build software components and applications that run on a wide variety of operating systems (platforms)—including mobile devices, game consoles, web applications, Internet of Things (IoT), microservices, and desktop applications. Furthermore, C# is free; in fact, it is entirely open source, so you can view, modify, redistribute, and contribute back any improvements you make. As a language, C# is built on features found in its predecessor C-style languages (C, C++, and Java), making it immediately familiar to many experienced programmers.1
1. The first C# design meeting took place in 1998.
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