The example hello world program is duplicated in the beginners tutorial

[Mike D'Aguillo]

See: https://github.com/dotnet/training-tutorials/blob/master/content/csharp/getting-started/hello-world.md

This might be confusing for absolute beginners.

[Steve Smith]

Theoretically when the article is published only one of those two code blocks would be displayed. The .REPL one would be set to invisible (and was used to populate a live coding experience window).