C# Sharp Programming Examples Sample Problems with Output. In this Page you can learn C# Programs for Beginners. C#, like other general-purpose programming languages, can be used to create a wide range of programs and applications, including mobile apps, desktop apps, cloud-based services, websites, enterprise software, and games. There are numerous games from which to choose. C# is a popular programming language for developing desktop applications, web apps, and web services. It’s used to make massive amounts of Microsoft software. C# is also used in the development of Unity games.