And to me the opposite - Turbo/Borland Pascal/C++, or the E3 editor. Okay, turns out blue is not great color for you - but that was the "dark" theme at the time.

Agreed and this library definitely sparks joy; especially since I was looking for something just like this recently for a quick project.

C# the language has always felt like "Java, but better".

Now with .NET Core embracing cross platform and maturing nicely, it feels like the whole ecosystem can be described as "Java, but better". On Windows, it's already been there for a decade or more, but the label never felt right when hosting on Linux meant using an alternative runtime like Mono.

Hah! But it also feels a bit Norton Commander to me, and that's not that bad ;)

Also somehow reminded me of the old Borland Turbo-C++ 'IDE'. would love to have something like that with good tag navigation for daily driver.

Also "XTree" which was probably the best software ever for DOS.

I remember Xtree back in 1990. Oh boy, do I feel old. I still miss the lightning fast navigation using Xtree and NC afterwards. I used NC till the long filenames were an issue and though I know it supported it later on I just moved on to crappier trends. One recent trend is to completely disempower users by obscuring the file system away.

F# is even better. It is an amazing fun and productive language to work in. At the end of the day a language is just a language, but much the a keyboard some are more comfortable than others. I find F# very comfortable. C# is also very nice to work in. C# is probably a better choice as you spend less novelty points.

Blue background was a very common convention for DOS TUI. I'm not sure which app started it, but it was seen in MS-DOS editor / QBASIC; Norton Commander and its numerous clones; Turbo/Borland Pascal and C++; Microsoft C, Pascal and VB for DOS; FoxBASE / FoxPro; and so on.