Definitely not C#. Wrong syntax for main, wrong syntax for foreach (C# has foreach (var i in someCollection) and what even is this method call syntax with =?

Edit: I dug around the website. It’s D. I’m still confused about the method call syntax though. Usually, D uses parentheses like most other C-style languages. Must be some weird syntax where you can call methods like property setters which was useful for this particular code golf challenge.

That’s four screens total. You’re first on the chopping block.