C# Examples

Dave Braunschweig

File:C Sharp wordmark.svgOverview

C# is a general-purpose, object-oriented programming language encompassing strong typing, imperative, declarative, functional, generic, object-oriented (class-based), and component-oriented programming disciplines. It was developed around 2000 by Microsoft within its .NET initiative and later approved as a standard by Ecma (ECMA-334) and ISO (ISO/IEC 23270:2006). C# is one of the programming languages designed for the Common Language Infrastructure.[1]

C# is one of the most popular current programming languages[2], is the primary language for Windows application development and is often used in computer science and gaming courses.


Hello World

// This program displays "Hello world!"
// References:
// https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/inside-a-program/hello-world-your-first-program

public class Hello
    public static void Main()
        System.Console.WriteLine("Hello world!");


Hello world!


Each code element represents:[3]

  • // begins a comment
  • public class Hello begins the Hello World program
  • { begins a block of code
  • public static void Main() begins the main function
  • System.Console.WriteLine() calls the standard output write line function
  • "Hello world!" is the literal string to be displayed
  • ; ends each line of C# code
  • } ends a block of code


There are many free cloud-based and local IDEs available to begin coding in C#. Check with your instructor or do your own research for recommendations.

Cloud-Based IDEs

Local IDEs



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Programming Fundamentals Copyright © 2018 by Dave Braunschweig is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted.

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