The first program to compile is the traditional "Hello, World!". It is a console application that displays the "Hello, World!" message.

• Launch the Antechinus C# Editor
• Open HelloWorld.cs, located in the folder Projects/Lesson_1

  using System;

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

• Click on the 'Compile' button:

The compiler creates HelloWorld.exe and the Build pane reports on the compilation. Once the application has been generated, the Run button becomes enabled.

• Click on Run to see the application running

You just compiled and run your first C# program! But what happened? HelloWorld.exe is a console application, so it displayed the "Hello, World!" message for a fleeting moment and shut down, without giving you the time to examine the output. You can circumvent this by opening a DOS window and running the program from the command line, but Antechinus has a nice learning feature that allows you to run the program through a console.

• Click on Run through Console button

The program runs again and closes down, but the "Hello, World!" message is captured in the Editor's Output pane.
Note: To use Run through Console your program can only have text output. Pausing to solicit input from users would cause the editor to freeze, and you would have to press Ctrl-Alt-Delete to close it down. For such programs use Run instead.

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