First Program in C#

C# Tutorials - Herong's Tutorial Examples

∟First Program in C#

This section provides a tutorial example on how to write the first C# program to print out 'Hello world!' on the screen, compile it and run it on with .NET Framework.

Let's follow the tradition of the programming language world and write our first C# program to print out "Hello world!" on the screen.

You can use notepad to write the following code and save it as Hello.cs:

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

To compile and run the program, open a command window and issue the following commands:

C:\herong>set "NET=\windows\Microsoft.NET\Framework\v4.0.30319"

C:\herong>%NET%\csc Hello.cs
Microsoft (R) Visual C# Compiler version 4.6.1055.0
for C# 5
Copyright (C) Microsoft Corporation. All rights reserved.

C:\herong>Hello
Hello world!