The closest I've been able to find so far is this question on Stack Overflow. Unfortunately, the last release for the software recommended there was a beta release in 2010 (approximately 7 years ago at this point), so I'm assuming that it's abandonware, which is too bad because it seems to be exactly what I'm looking for. For reference, the developers described it as follows (and this is reflective of what I'm looking for as well):
- Fast edit-run-view cycle very similar to LinqPad. (Note: This is my primary goal in having such a tool).
- Syntax highlighting.
- Error highlighting.
- Intellisense (primarily for jQuery but eventually for HTML too)
- Hands-on documentation (again primarily for jQuery)
- Compact deployment (just the exe should do and .Net 3.5 prerequisite of course)
Is anyone aware of some kind of non-abandonware project that does something like this?