Programs written in as few characters as possible. Purely for recreational purposes, not examples of good or useful code.
For brevity, the C# scripts do not include class and method declarations, just the script itself. They can be executed in a C# REPL / script executor (check out this one!), the C# Interactive window in Visual Studio, or simply placed inside a Main method in an empty program.
The graphical scripts look best with a font that renders the graphic characters properly. I've used the built-in Windows font Terminal with size 5 / 4x6 pixels in the screenshots.